69 files changed, 38 insertions, 10456 deletions
diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 17008a0..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-doc/*.html
-doc/*.pdf
-nissy
-nissy-*
-test
diff --git a/INSTALL b/INSTALL
deleted file mode 100644
index ffc461d..0000000
--- a/INSTALL
+++ /dev/null
@@ -1,81 +0,0 @@
-# Website
-Nissy is available at https://nissy.tronto.net
-# Requirements
-A full installation of nissy requires about 3Gb of space, of which
-2.3Gb are occupied by the huge pruning table for fast optimal solving,
-and running it requires the same amount of RAM.  One can choose to never
-use this function and not to install the relative pruning table. There
-is an alternative (slower) optimal solving function that uses about
-500Mb of RAM.  When generating the pruning tables automatically (see
-the section Tables below), at least 5.3Gb or RAM are required.
-# Installation
-## On Windows
-Try downloading and executing in a terminal the file nissy.exe, then
-follow the instructions in the Tables section below for installing the
-pruning tables. If nissy.exe does not work, you can try following the
-UNIX instructions in WSL (Windows Subsystem for Linux) or in a similar
-environment.
-## On a UNIX system:
-Download the source archive (.tar.gz). Extract it with your favorite
-archive program, for example with
-        tar -xvzf nissy-VERSION.tar.gz
-Open a terminal in the directory just extracted. If you wish, edit the
-Makefile to match your local configuration (this is usually not necessary,
-but you may want to change the PREFIX variable to change the installation
-path) and run
-        make
-followed by
-        make install
-Then follow the instructions below to install the pruning tables. 
-## Tables
-Once you have installed nissy, run
-        nissy gen
-to generate all the tables that Nissy will ever need. Running this
-command requires around 5.3Gb of RAM, and it can take some time (about
-40 minutes on my fairly old but decent laptop, with 8 CPU threads).
-Some unnecessary technical detail: by default this command is going to
-use at most 64 threads. If you want you can choose to use more threads
-(if your CPU is very powerful) or fewer threads (if you for example
-want to run this command in the background while you do other stuff)
-with the -t option, for example nissy gen -t 1.
-Alternatively, you can download all the tables (1.7Gb) and copy them
-into the correct folder (see manual page, ENVIRONMENT section). On UNIX
-operating systems this folder is either .nissy/tables in the user's
-home directory or $XDG_DATA_HOME/nissy/tables if the XDG variable
-is configured. On Windows it is the same directory as the nissy.exe
-executable file.
-You can downloads all the tables from the following link:
-        https://nissy.tronto.net/nissy-tables-2.0.2.zip
-# Upgrading
-If you already have nissy installed and you want to upgrade to a more
-recent version, you can simply repeat the installation process:
-* On Windows: simply replace nissy.exe with the new file with the same name.
-* On UNIX systems: download the new version of the source code, extract it
-  in a new folder and run make and make install again.
-Between each version new table files might have been added, or old ones
-may be not used anymore. Nissy will deal with this automatically.
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index b61b417..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,636 +0,0 @@
-The following license applies to every C source code and header file 
-distributed with this LICENSE file.
-    Nissy - A Rubik's cube solver and FMC assistant
-    Copyright (C) 2020-2022 Sebastiano Tronto <sebastiano@tronto.net>
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-                   GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-                            Preamble
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
-  The precise terms and conditions for copying, distribution and
-modification follow.
-                       TERMS AND CONDITIONS
-  0. Definitions.
-  "This License" refers to version 3 of the GNU General Public License.
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-  To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
-  A "covered work" means either the unmodified Program or a work based
-on the Program.
-  To "propagate" a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-  To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-  1. Source Code.
-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
-  A "Standard Interface" means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-  The "System Libraries" of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-"Major Component", in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-  The "Corresponding Source" for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
-  The Corresponding Source for a work in source code form is that
-same work.
-  2. Basic Permissions.
-  All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-  No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-  When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
-  4. Conveying Verbatim Copies.
-  You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-  You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-  5. Conveying Modified Source Versions.
-  You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
-    a) The work must carry prominent notices stating that you modified
-    it, and giving a relevant date.
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-    c) You must license the entire work, as a whole, under this
-    License to anyone who comes into possession of a copy.  This
-    License will therefore apply, along with any applicable section 7
-    additional terms, to the whole of the work, and all its parts,
-    regardless of how they are packaged.  This License gives no
-    permission to license the work in any other way, but it does not
-    invalidate such permission if you have separately received it.
-    d) If the work has interactive user interfaces, each must display
-    Appropriate Legal Notices; however, if the Program has interactive
-    interfaces that do not display Appropriate Legal Notices, your
-    work need not make them do so.
-  A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-"aggregate" if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-  6. Conveying Non-Source Forms.
-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
-    a) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by the
-    Corresponding Source fixed on a durable physical medium
-    customarily used for software interchange.
-    b) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by a
-    written offer, valid for at least three years and valid for as
-    long as you offer spare parts or customer support for that product
-    model, to give anyone who possesses the object code either (1) a
-    copy of the Corresponding Source for all the software in the
-    product that is covered by this License, on a durable physical
-    medium customarily used for software interchange, for a price no
-    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-    c) Convey individual copies of the object code with a copy of the
-    written offer to provide the Corresponding Source.  This
-    alternative is allowed only occasionally and noncommercially, and
-    only if you received the object code with such an offer, in accord
-    with subsection 6b.
-    d) Convey the object code by offering access from a designated
-    place (gratis or for a charge), and offer equivalent access to the
-    Corresponding Source in the same way through the same place at no
-    further charge.  You need not require recipients to copy the
-    Corresponding Source along with the object code.  If the place to
-    copy the object code is a network server, the Corresponding Source
-    may be on a different server (operated by you or a third party)
-    that supports equivalent copying facilities, provided you maintain
-    clear directions next to the object code saying where to find the
-    Corresponding Source.  Regardless of what server hosts the
-    Corresponding Source, you remain obligated to ensure that it is
-    available for as long as needed to satisfy these requirements.
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
-  A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-  A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
-  "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
-  If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-  The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
-  Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-  7. Additional Terms.
-  "Additional permissions" are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-  When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-  Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
-    a) Disclaiming warranty or limiting liability differently from the
-    terms of sections 15 and 16 of this License; or
-    b) Requiring preservation of specified reasonable legal notices or
-    author attributions in that material or in the Appropriate Legal
-    Notices displayed by works containing it; or
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
-    reasonable ways as different from the original version; or
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-    e) Declining to grant rights under trademark law for use of some
-    trade names, trademarks, or service marks; or
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
-  All other non-permissive additional terms are considered "further
-restrictions" within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-  If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-  Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
-  8. Termination.
-  You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
-  Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-  Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-  9. Acceptance Not Required for Having Copies.
-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-  10. Automatic Licensing of Downstream Recipients.
-  Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-  An "entity transaction" is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-  You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-  11. Patents.
-  A "contributor" is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's "contributor version".
-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, "control" includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-  Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-  In the following three paragraphs, a "patent license" is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To "grant" such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-  12. No Surrender of Others' Freedom.
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-  13. Use with the GNU Affero General Public License.
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-  14. Revised Versions of this License.
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-  15. Disclaimer of Warranty.
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-  16. Limitation of Liability.
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-  17. Interpretation of Sections 15 and 16.
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 71eda6b..0000000
--- a/Makefile
+++ /dev/null
@@ -1,68 +0,0 @@
-# See LICENSE file for copyright and license details.
-VERSION = post-2.0.2
-PREFIX = /usr/local
-MANPREFIX = ${PREFIX}/share/man
-CPPFLAGS  = -DVERSION=\"${VERSION}\"
-CFLAGS    = -std=c99 -pthread -pedantic -Wall -Wextra \
-            -Wno-unused-parameter -O3 ${CPPFLAGS}
-DBGFLAGS  = -std=c99 -pthread -pedantic -Wall -Wextra \
-            -Wno-unused-parameter -g ${CPPFLAGS}
-CC = cc
-all: nissy
-nissy: clean
-        ${CC} ${CFLAGS} -o nissy src/*.c
-nissy.exe:
-        x86_64-w64-mingw32-gcc ${CFLAGS} -static -o nissy.exe src/*.c
-debug:
-        ${CC} ${DBGFLAGS} -o nissy src/*.c
-test:
-        ${CC} ${DBGFLAGS} -DTEST -o test src/*.c tests/*.c
-clean:
-        rm -rf nissy nissy*.exe nissy*.tar.gz doc/nissy.html doc/nissy.pdf
-dist: clean nissy.exe
-        mkdir -p nissy-${VERSION}
-        cp -R LICENSE Makefile INSTALL doc src nissy-${VERSION}
-        groff -Tpdf   -mandoc doc/nissy.1 > doc/nissy.pdf 
-        groff -Thtml  -mandoc doc/nissy.1 > doc/nissy.html 
-        cp doc/nissy.pdf nissy-${VERSION}/doc/nissy.pdf 
-        cp doc/nissy.html nissy-${VERSION}/doc/nissy.html 
-        tar -cf nissy-${VERSION}.tar nissy-${VERSION}
-        gzip nissy-${VERSION}.tar
-        rm -rf nissy-${VERSION}
-        mv nissy.exe nissy-${VERSION}.exe
-upload: dist
-        rsync -v --rsync-path=openrsync nissy-${VERSION}.exe \
-                tronto.net:/var/www/htdocs/nissy.tronto.net/
-        rsync -v --rsync-path=openrsync nissy-${VERSION}.tar.gz \
-                tronto.net:/var/www/htdocs/nissy.tronto.net/
-website:
-        rsync -rv --rsync-path=openrsync \
-                www/ tronto.net:/var/www/htdocs/nissy.tronto.net
-install: nissy
-        mkdir -p ${DESTDIR}${PREFIX}/bin
-        cp -f nissy ${DESTDIR}${PREFIX}/bin/nissy
-        chmod 755 ${DESTDIR}${PREFIX}/bin/nissy
-        mkdir -p ${DESTDIR}${MANPREFIX}/man1
-        sed "s/VERSION/${VERSION}/g" < doc/nissy.1 \
-                                     > ${DESTDIR}${MANPREFIX}/man1/nissy.1
-        chmod 644 ${DESTDIR}${MANPREFIX}/man1/nissy.1
-uninstall:
-        rm -rf ${DESTDIR}${PREFIX}/bin/nissy ${DESTDIR}${MANPREFIX}/man1/nissy.1
-        for s in ${SCRIPTS}; do rm -rf ${DESTDIR}${PREFIX}/bin/$$s; done
-.PHONY: all debug test clean dist install uninstall upload
diff --git a/README.md b/README.md
index 8aa6a2d..7b0beda 100644
--- a/README.md
+++ b/README.md
@@ -1,104 +1,50 @@
-# WARNING
+# Where is nissy?
-I am currently rewriting some important parts of the code
+In April 2023 I have decided to split nissy in 2 separate projects: an
-and the git version is not working.
+optimal solver and an FMC assistant. These two projects are not usable
-You can download the last stable version from the
+yet, so in the meantime I will keep a third branch where I update the
-[download page](https://nissy.tronto.net/download).
+classic version of nissy with bugfixes and minor improvements.
-# Nissy
+You can find these three branches at the following pages (also
+on github, links below are to my personal git instance):
-A Rubik's cube solver and FMC assistant.
+* [nissy-classic](https://git.tronto.net/nissy-classic): The stable
-For optimal HTM solving Nissy uses techniques from Herbert Kociemba's
+  branch, will receive bugfixes and minor improvements but no big
-[Cube Explorer](http://kociemba.org/cube.htm) and Tomas Rokicki's
+  change. Will eventually be replaced by the other two versions.
-[nxopt](https://github.com/rokicki/cube20src/blob/master/nxopt.md).
+* [nissy-fmc](https://git.tronto.net/nissy-fmc): This will focus on
-With 4 cores at 2.5GHz and using about 3Gb of RAM, Nissy can find an
+  features useful for practicing FMC, for example finding EOs and
-optimal solution in about a minute on average.
+  DRs (if you do not know what this means, there is a good chance
+  you don't care). I plan to make a graphical interface for it and
+  make it more usable. It will not be able to find an optimal
+  solution. *Not working at the moment.*
+* [nissy-nx](https://git.tronto.net/nissy-nx): An optimal solver.
+  For now this is just my playground for implementing complex
+  optimizations, following the ideas of Tomas's Rokicki's
+  [nxopt](https://github.com/rokicki/cube20src/blob/master/nxopt.md).
+  Eventually it will become faster than nissy-classic at optimal
+  solving, but without all other features. *Not working at the moment.*
-Nissy can also solve many different substeps of Thistlethwaite's algorithm
+# I am a user of nissy, what should I do?
-(DR/HTR), and can use NISS (Normal-Inverse Scramble Switch).
-It can be useful to analyze your DR solves (and more, once I implement more features).
-You can get Nissy from [nissy.tronto.net](https://nissy.tronto.net).
+If you are happy with using nissy as it is, you can keep using it.
-The download links and installation instructions can be found on the
-[download page](https://nissy.tronto.net/download).
-## Structure of the code
+When nissy-fmc and nissy-classic are ready, you can chek them out too.
-You can find all the source code in the `src` folder.
+# But I liked that nissy can do both optimal solving! Why did you split it?
-I strived to keep it legible but I did not write many comments (barely any at all).
-I'll try to explain here the main parts of the program.
-### Cube, moves and transformations
+Then I encourage you to keep using nissy-classic :-)
-There are many ways to represent a cube. In Nissy I use two:
+See
+[my blog post](https://sebastiano.tronto.net/blog/2023-04-10-the-big-rewrite/)
+for some reasons behind this change.
-* An array representation `CubeArray`: 3 arrays representing the permutation
+# I just want to look at the code, where should I go?
-of corners, edges and centers and 2 arrays for the orientation of corners and edges.
-* An 11-integers representation `Cube`: 3 integers for edge orientation (with respect
-to the three axes), 3 for corner orientation, and so on. Edge permutation is a bit
-complicated because encoding 12 factorial as a single number is too large for some
-practical reasons, so I use 3 integers for that.
-Moves are easy to apply on the array form, but they are slow. So `moves.c`
+If you want to check out the git repository of the version you are
-contains the instructions to create all the transition tables necessary
+running, you probably want nissy-classic. The newer nissy-fmc will
-to get the next position for the cube with just 11 lookup operations
+eventually be nicer and easier to read, containing more or less
-(one for each of the 11 integers in the second representation).
+the same functionality (except for optimal solving).
-These transition tables are saved in the `mtables` file in the
-`tables` folder in binary format.
-The 11 integers are obviously redundant, but keeping all of them makes it easy
-to apply transformations. A transformation is a rotation of the whole cube, possibly
-combined with a mirror operation. Applying a transformation to a cube (say obtained
-by applying a scramble to the solved cube) means applying the transformation to a
-solved cube, then the scramble and then the inverse of the transformation
-(i.e. conjugating by it).
-### Coordinates and pruning tables
-A *coordinate* consists of a function that takes a cube (in the 11-integer
-representation) and return an (unsigned, 64-bit) integer. They are used
-to "linearize" a cube and build pruning tables, which speed up significantly the
-solving process. To be able to access the pruning table quickly, the function
-needs to be very fast (e.g. it should not convert between the two representations
-of the cube if not necessary).
-Some coordinates make use of symmetries to reduce the size of the resulting
-pruning table. Unfortunately this complicates the code a lot, but it is a huge
-advantage: it reduces by a factor of about 16 the pruning table size.
-Pruning tables are related to a specific step, a moveset and a coordinate. They
-contain one value from 0 to 15 (4 bits) for each possible value for the coordinate,
-which is less or equal than the minimum number of moves required to solve the
-given step with the given moveset for a cube which has the given coordinate. For example,
-say the coordinate `neo` gives the number of non-oriented edges (say with respect to
-F/B). Then the possible values for the coordinate are 0,2,4,...,12. An associated
-pruning table to solving EO with HTM moveset and this coordinate would have values 0
-(for `neo=0`), 3 (for `neo=2`), 1 (for `neo=4`)...
-The values for most pruning tables are memorized modulo 16, so they only occupy
-4 bits per entry, and values larger than 15 are saved as 15. This is good enough
-for most applications.
-Some large tables are memorized in compact form using only 2 bits, similarly
-to what [nxopt](https://github.com/rokicki/cube20src/blob/master/nxopt.md) does:
-a base value `b` is picked and a value of `n` is saved as `MIN(3,MAX(0,n-b))`.
-When a value of `v=1,2,3` is read it is simply returned as `v+b`, while if
-`0` is a successive lookup to a fallback table is performed. The base value `b`
-is picked to maximize the sum frequency of the values `1,2,3`.
-In order to generate the pruning tables, it is necessary to be able to move
-a transform a coordinate; it is possible to do so without passing through a
-complete cube representations, in a way similar to what Cube Explorer does.
-This used to be different before version 2.1 (June 2022).
-More documentation on this and on the different types of coordinates (base
-vs composed) is work in progress.
-### Solving
-Solving is implemented as a generic function that takes both a step and
-a (scrambled) cube as input, as well as some extra parameters that say e.g.
-how many solution one wants. A step consists, among other things, of
-an estimator function that, given a cube, gives a lower bound for the number
-of moves needed to complete the step. Many of these estimators simply
-look up the corresponding values in the appropriate pruning table.
+If you want to follow my progress on an advanced optimal Rubik's
+cube solver, you can check out nissy-nx - just remember that it
+does not work yet!
diff --git a/TODO/2.1.md b/TODO/2.1.md
deleted file mode 100644
index 7448094..0000000
--- a/TODO/2.1.md
+++ /dev/null
@@ -1,51 +0,0 @@
-# TODO-list for version 2.1 (or is it 3.0 at this point?)
-## Rework solver
-### 1. Implement minimum viable
-* Implement nxopt31 with fst_cube. Remember that the function
-  move_check_solved() should do one axis at the time, so that we don't move
-  everything before checking.
-* test?
-### 2. Rework achitecture and file dependencies
-* solve.h depends only on moves(alg?) (dependency on step and trans is removed).
-* Other modules have changed dependencies, might as well rework all.
-* Make files smaller, do not include definition in .h, separate
-data from abstract operations.
-* remove cubetypes.h
-* Create a module for multi-step (maybe wait?)
-* Possible changes: in step solver, copy cube only if niss; add cleanup function
-in solver (called by solve()) to free cube and perhaps pruning tables.
-* see various TODO's in files
-### 4. More threading options
-* Lazy multithread: threads are as independent as possible and only
-merged at the end. Ideal when all solutions of a certain length are requested.
-* (Done) Eager multithread: current implementation, branches communicate the
-number and list of solutions to stop as soon as possible. Good when only one
-solution of a certain depth is required.
-## Simplify steps
-* Remove one type of rotation.
-* Change steps to choicestep and stepalt to step (or was this already done?).
-## Add missing coordinates and steps
-* Check the old file for a list. Many are missing.
-* Checkers in steps.c should use coordinates.
-## Missing and new commands
-* gen
-* freemem
-* twophase
-## Easy improvements
-* Solve should re-orient the cube if centers are off
-* Solve: add options for -I (inverse only) and -L (linear = normal + inverse).
diff --git a/TODO/build-options.md b/TODO/build-options.md
deleted file mode 100644
index 83b8a34..0000000
--- a/TODO/build-options.md
+++ /dev/null
@@ -1,33 +0,0 @@
-# Build options for memory and multithreading
-## Investigate
-* Check exactly how much memory is needed for everything.
-* Take note of which parts use threading (solving, genptable, other?).
-## Prepare code
-* Use define / ifdef or similar to compile and build tables only for the
-  parts to be used.
-* If threads = 1, use a much simpler version of the solve method. Remember
-  that checking if enough solutions have been found is the first thing to
-  do in singlethread (no locking).
-* Do not include pthread if threads = 1. 
-* Only one optimal solver should be compiled.
-* Some simple steps may also need alternatives with smaller tables
-  (e.g. for staying sub 1Gb). For example dr and drfin.
-* If necessary, work out alternatives to "twophase" for low-resource versions.
-## Makefile
-* Figure out how to change these options via makefile. For example: one
-  variable for the maximum allowed ram and one for the number of threads.
-* (Optional) use a configure script?
-* (Optional) interactive installation script?
-## Automate
-* Scout for resources during installation and choose best configuration
-  automatically.
-* How to do this in Linux / POSIX?
-* How to do this in Windows?
diff --git a/TODO/documentation.md b/TODO/documentation.md
deleted file mode 100644
index 050a854..0000000
--- a/TODO/documentation.md
+++ /dev/null
@@ -1,41 +0,0 @@
-# Documentation
-## Big documentation file on nissy's internals
-* Coordinates
-* Symcoordinates
-* Pruning tables
-* Coordinate solving
-* fst cube
-* Optimized solver
-* Multithreading
-* Commands etc...
-* Code architecture
-## examples.md
-* Example file for nissy's website and documentation folder
-* With screenshots!
-## Random info
-Where to collect random information like this table?
-Table pt_nxopt31_HTM
-Base value: 9
-0               1
-1               6
-2              29
-3             164
-4            1433
-5           16772
-6          205033
-7         2513871
-8        30329976
-9       342440769
-10     2815191126
-11     6147967200
-12      524918774
-13           3546
-14              0
-15              0
diff --git a/TODO/easy.md b/TODO/easy.md
deleted file mode 100644
index 7d780e2..0000000
--- a/TODO/easy.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# Easy things to improve or add
-## Improvements
-* Silent batch mode without >>>
-* Solutions should be shown sorted: by length first, then by normal moves
-  (no niss) first, then it depends on the step (e.g. EO by axis).
-## Old commands and steps
-* drcorners (solve corners after DR)
-* Search and improve suboptimal subsequences
-## New commands
-* notation: show valid moves
diff --git a/TODO/installation.md b/TODO/installation.md
deleted file mode 100644
index 7f632c2..0000000
--- a/TODO/installation.md
+++ /dev/null
@@ -1,14 +0,0 @@
-# Simplify and improve installation
-## Tables
-* Make install should generate tables, or add a "make tables" target to
-  generate tables.
-* Make tables should also check for existing files and remove old ones
-  (maybe more for nissy's command than for makefile).
-## Correctness
-* Add checksum for all generated files.
-* Hard-code results? Check for compatibility problems between different OSes
-  and filesystems - but there should not be any, since we use stdint.h.
diff --git a/TODO/new-feature-ideas.md b/TODO/new-feature-ideas.md
deleted file mode 100644
index 067d440..0000000
--- a/TODO/new-feature-ideas.md
+++ /dev/null
@@ -1,32 +0,0 @@
-# Possible new features and improvements
-This file contains non-refined ideas. Once an idea gets refined, it will
-get its own file and more details.
-## Steps
-* QTM solver
-* 5-side solver (for robots)
-* Other steps (cross, blocks, LSE...)
-## UX features
-* Save algs as variables and edit them (like in old nissy)
-* Use a logging system for previously run commands, info, results...
-  (e.g. when solving with -c solutions are not shown, they can be logged here)
-* Configurability: add an "alias" command, run config file at startup
-* Input cube state directly instead of moves (ugly from command line / file)
-## Improvements
-* Optimal solver: when asking only for one solution, scan for upper bound in
-  parallel using a non-optimal (but fast) solver (e.g. twophase).
-* Optimal solver: up to a small bound, try with a small pruning table.
-* Optimal solver: start at different depths in parallel
-* Multi-step solver: make more general
-## New features
-* Allow user to specify moveset manually (see issue \#5 on github)
-* EO analysis (and also DR and HTR analysis): group similar EOs (Jay)
-* HTR "maze" analysis?
diff --git a/TODO/parser.md b/TODO/parser.md
deleted file mode 100644
index 134f0d7..0000000
--- a/TODO/parser.md
+++ /dev/null
@@ -1,13 +0,0 @@
-# Improve command parser
-First, expand this TODO file to be more precise.
-## Refactor
-* The syntax of a command's options should be described by data, not by a
-  parser function.
-* A single parser function can then parse options for all commands.
-## Usability
-* Better error messages!
diff --git a/TODO/refactoring.md b/TODO/refactoring.md
deleted file mode 100644
index eedbd20..0000000
--- a/TODO/refactoring.md
+++ /dev/null
@@ -1,28 +0,0 @@
-# Refactoring
-## Init functions
-* All .h files should have a single init function.
-* This function should initialize everything that this module needs, including
-  calling the init functions of the modules it depends on.
-* To avoid multiple initialization of the same module, each should have a
-  static bool initialized variable.
-* Everything that a module needs should be initialized by init(), avoid
-  initializing stuff when solving. Exception: pruning tables, move tables.
-* Most functions should generate some tables and save them to disk.
-* Init functions should have a consistent structure (e.g. the way they check
-  if the tables are already generated should be the same).
-## Cube types
-* Get rid of cubetype.h, split type definitionss into the other modules.
-* Every type definition should be in the most fundamental module that needs it.
-## Code style
-* Stop declaring all variables at the beginning of a function.
-* Remove variable names from prototypes.
-* Sort function implementations alphabetically, ignore static vs non static.
-* Rename functions and variable to have a consistent naming scheme.
-* Functions that copy data: swap src and dest, follow memcpy standard.
-* Read style(9) and decide what to implement.
diff --git a/TODO/testing.md b/TODO/testing.md
deleted file mode 100644
index 1deb93a..0000000
--- a/TODO/testing.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# Testing
-## Write tests
-* Write tests for each module. Some of might require refactoring (this is
-  a good thing!)
diff --git a/TODO/webapp.md b/TODO/webapp.md
deleted file mode 100644
index 4f8eddf..0000000
--- a/TODO/webapp.md
+++ /dev/null
@@ -1,19 +0,0 @@
-# Towards a nissy webapp
-## Architecture
-* Split in client / server.
-* Server can load and keep in memory all the tables, client(s) send messages to
-  the server to run commands.
-* Use UNIX sockets only first, maybe later try WinSock.
-## Simple webapp
-* Investigate how to use fastcgi, try simple program first.
-* Decide what limits to put in terms of resources and write a "filter" script
-  to block big requests (maybe use a timeout).
-## Advanced webapp
-* Use cubing.js for nice graphics.
-* Port it to a graphical desktop version too.
diff --git a/doc/nissy.1 b/doc/nissy.1
deleted file mode 100644
index 138d6ae..0000000
--- a/doc/nissy.1
+++ /dev/null
@@ -1,271 +0,0 @@
-.Dd November 2021
-.Dt NISSY 1
-.Os
-.Sh NAME
-.Nm nissy
-.Nd a Rubik's cube solver and FMC assistant
-.
-.Sh SYNOPSIS
-.Nm
-.Op Fl b
-.Nm
-.Ar command
-.Op options...
-.
-.Sh DESCRIPTION
-.Nm
-is a Rubik's Cube solver. 
-It uses techniques from Herbert Kociemba's Cube Explorer and
-Tomas Rokicki's nxopt. With 4 cores at 2.5GHz and using about 3Gb
-of RAM, Nissy can find the optimal solution for a random Rubik's cube position
-in about a minute on average.
-Nissy can also solve different substeps of the Thistlethwaite's algorithm and more.
-.Pp
-When run without any argument an interactive shell is launched, otherwise
-the provided
-.Ar command
-is executed and nissy terminates. If the option
-.Fl b
-is given, every argument after it is ignored and the shell is launched without
-any prompt or welcome message. This can be used to run nissy in batch mode,
-for example writing a list of commands in a
-.Ar file
-(one per line) and running
-.Ar nissy -b < file
-.Pp
-The commands that can be run in the interactive shell are the same that can
-be run non-interactively and are provided below.
-.
-.Sh COMMANDS
-The available
-.Ar commands
-are the following:
-.
-.Bl -tag -width Ds
-.
-.It Nm cleanup Ar scramble
-Rewrites the given scramble using only the 18 base (HTM) moves and at most two
-rotations at the end. If
-Ar scramble
-uses NISS, all moves done on normal scramble are written first, followed by
-all moves done on inverse.
-.
-.It Nm commands
-List all available commands.
-.
-.It Nm freemem
-Release some large tables from memory. You can use this command in case
-you want to keep nissy open without using too much RAM.
-.
-.It Nm gen Op Fl t Ar N
-Generate all tables used by nissy. Run this to complete your installation.
-If
-.Ar N
-is specified,
-.Ar N
-CPU threads will be used (defaults to 64, use less only if you don't want
-nissy to use all of your CPU resources).
-.
-.It Nm help Op Ar command
-Display help. If no
-.Ar command
-is given, a generic help message is printed, otherwise a specific help
-relative to
-.Ar command
-is returned.
-.
-.It Nm invert Ar scramble
-Invert the given scramble.
-.
-.It Nm print Ar scramble
-Display a text-only description of the cube obtained after applying
-.Ar scramble .
-.
-.It Nm quit
-Quit nissy.
-.
-.It Nm scramble Oo Fl n Ar N Oc Oo Ar type Oc
-Print a randomly-generated (random position) scramble
-.
-If
-.Ar N
-is given, it produces
-.Ar N
-scrambles.
-.Ar type
-can be specified to be one of the following:
-.Bl -tag -width Ds
-.It Ar corners
-Scramble with solved edges (only cornes are scrambled).
-.It Ar dr
-Scramble with solved DR on U/D.
-.It Ar edges
-Scramble with solved corners (only edges are scrambled).
-.It Ar eo
-Scramble with solved EO on F/B axis.
-.It Ar fmc
-Scramble the full cube and the resulting scramble starts and ends with
-the moves R\(aq U\(aq F.
-.It Ar htr
-Scramble with HTR solved.
-.El
-.
-.It Nm solve Ar step Oo Ar options Oc Ar scramble
-Solve the given
-.Ar step
-on the given
-.Ar scramble.
-By default it finds only one (shortest) solution, without using niss, and it
-displays the number of moves at the end of the line.
-.
-The options for the
-.Ar solve
-command are the following:
-.
-.Bl -tag -width Ds
-.
-.It Fl a
-Print all solutions: some solutions are filtered out by default for some
-steps, for examples EOs that finish with F\(aq, with this options they are not.
-.
-.It Fl c
-Display only the number of solutions found, not the solutions themselves.
-.
-.It Fl m Ar min
-Only look for solution that are at least
-.Ar min
-moves long.
-.
-.It Fl M Ar MAX
-Only look for solution that are at most
-.Ar MAX
-moves long.
-.
-.It Fl n Ar N
-Try to find
-.Ar N
-solutions. By default and unless the
-.Fl M
-or
-.Fl o
-options are used, at most one solution is returned. 
-If at least one of
-.Fl M
-and
-.Fl o
-is used, all the solutions found within the given bounds are returned.
-The option
-.Fl s
-overwrites these default behaviors and at most
-.Ar N
-solutions are returned, still satisfiyng the other constraints.
-.
-.It Fl N
-Allow use of NISS.
-.
-.It Fl o
-Only find solutions that require the minimum number of moves.
-.
-.It Fl O Ar N
-Only find solutions that require at most
-.Ar N
-moves more than the optimal solution. If
-.Ar N
-is 0, this is equivalent to
-.Fl o
-.
-.It Fl p
-Plain style: do not print the number of moves.
-.
-.It Fl t Ar N
-Use
-.Ar N
-CPU threads. By default nissy uses only 1 thread. Using more than one
-thread will improve performance, but the optimal number depends on your
-machine and operating system. Generally, using one less than the number
-of threads of your CPU works quite well.
-.
-.It Fl v
-Verbose mode: print some information during the search and print each solution
-as it is found instead of only printing them all together at the end.
-.
-.
-.El
-.
-.It Nm steps
-List all available
-.Ar steps
-for the
-.Ar solve
-command.
-.
-.It Nm twophase Ar scramble
-Find a solution using a two-phase method. This does not guarantee
-to return an optimal solution (and in fact most often it does not),
-but it is very fast.
-.
-.It Nm unniss Ar scramble
-Rewrite the scramble without using NISS.
-.
-.It Nm version
-Display version information.
-.
-.El
-.
-.Sh SCRAMBLES
-All the commands above that accept a scramble also accept a
-.Fl Nm i
-option with no arguments.
-If this option is given, multiple scrambles are read from standard
-input (one per line) until and EOF is found, at which point stdin is cleared.
-.
-.Sh ENVIRONMENT
-Data is stored in the folder pointed to by
-.Nm $NISSYDATA.
-If that variable is unset the folder
-.Nm $XDG_DATA_HOME/nissy
-or
-.Nm $HOME/.nissy
-is used instead. If none of this environment variables is defined
-(e.g. in a non-UNIX system), the current folder is used.
-.
-.Sh EXAMPLES
-.Pp
-The command:
-.Dl nissy solve -v -O 1 \(dqR\(aqU\(aqFD2L2FR2U2R2BD2LB2D\(aqB2L\(aqR\(aqBD2BU2LU2R\(aqU\(aqF\(dq
-Returns:
-.Dl Searching depth 0
-.Dl Searching depth 1
-.Dl (some more lines)
-.Dl Searching depth 16
-.Dl D2 F\(aq U2 D2 F\(aq L2 D R2 D F B2 R\(aq L2 F\(aq U\(aq D
-.Dl Searching depth 17
-.Dl D2 F\(aq U2 D2 F\(aq L2 D R2 D F B2 R\(aq L2 F\(aq U\(aq D (16)
-Notice that the solution is printed twice: the first time it is printed as soon
-as it is found as requested by the -v option.
-.Pp
-The command:
-.Dl nissy solve eofb -m 4 -M 5 -N -n 6 \(dqR\(aqU\(aqFD2L2 FR2 U2R2BD2 L B2 D\(aq B2 L\(aq R\(aq\(dq
-Returns:
-.Dl U B U\(aq B (4)
-.Dl U (B R\(aq B) (4)
-.Dl (U B R\(aq B) (4)
-.Dl U2 F R2 F (4)
-.Dl U2 B U2 B (4)
-.Dl (U2 B R\(aq B) (4)
-.Pp
-On a UNIX shell, the composite command
-.Dl nissy scramble -n 2 | nissy solve -i > file.txt
-Generates two random scrambles, solves them and saves the result to file.txt.
-The file will look something like this:
-.Dl >>> Line: D U2 F D B\(aq F L2 D\(aq F2 R2 L B2 L\(aq U2 B2 R F2 L\(aq D2
-.Dl U2 R2 F2 L B2 D\(aq R2 D\(aq F U L2 B\(aq U\(aq R2 D2 R2 U (17)
-.Dl >>> Line: D B R U\(aq B\(aq L2 U L U D2 R L B2 U2 L2 U2 R U2 B2 L F2
-.Dl D\(aq F R\(aq D B L2 B R2 L U L U2 B D\(aq U R U F2 (18)
-.
-.Sh AUTHORS
-.An Sebastiano Tronto Aq Mt sebastiano@tronto.net
-.
-.Sh SOURCE CODE
-Source code is available at
-.Lk https://nissy.tronto.net
diff --git a/old/maybe-useful-coord.c b/old/maybe-useful-coord.c
deleted file mode 100644
index 9ab2971..0000000
--- a/old/maybe-useful-coord.c
+++ /dev/null
@@ -1,181 +0,0 @@
-int
-array_ep_to_epos(int *ep, int *ss)
-{
-        int epos[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-        int eps[4];
-        int i, j, is;
-        for (i = 0, is = 0; i < 12; i++) {
-                for (j = 0; j < 4; j++) {
-                        if (ep[i] == ss[j]) {
-                                eps[is++] = j;
-                                epos[i] = 1;
-                        }
-                }
-        }
-        for (i = 0; i < 4; i++)
-                swap(&epos[ss[i]], &epos[i+8]);
-        return 24 * subset_to_index(epos, 12, 4) + perm_to_index(eps, 4);
-}
-void
-epos_to_compatible_ep(int epos, int *ep, int *ss)
-{
-        int i, j, k, other[8];
-        bool flag;
-        for (i = 0; i < 12; i++)
-                ep[i] = -1;
-        epos_to_partial_ep(epos, ep, ss);
-        for (i = 0, j = 0; i < 12; i++) {
-                flag = false;
-                for (k = 0; k < 4; k++)
-                        flag = flag || (i == ss[k]);
-                if (!flag)
-                        other[j++] = i;
-        }
-                
-        for (i = 0, j = 0; i < 12; i++)
-                if (ep[i] == -1)
-                        ep[i] = other[j++];
-}
-void
-epos_to_partial_ep(int epos, int *ep, int *ss)
-{
-        int i, is, eposs[12], eps[4];
-        index_to_perm(epos % FACTORIAL4, 4, eps);
-        index_to_subset(epos / FACTORIAL4, 12, 4, eposs);
-        for (i = 0; i < 4; i++)
-                swap(&eposs[ss[i]], &eposs[i+8]);
-        for (i = 0, is = 0; i < 12; i++)
-                if (eposs[i])
-                        ep[i] = ss[eps[is++]];
-}
-void
-fix_eorleoud(CubeArray *arr)
-{
-        int i;
-        for (i = 0; i < 12; i++) {
-                if ((edge_slice(i) == 0 && edge_slice(arr->ep[i]) != 0) ||
-                    (edge_slice(i) != 0 && edge_slice(arr->ep[i]) == 0)) {
-                        arr->eorl[i] = 1 - arr->eofb[i];
-                } else {
-                        arr->eorl[i] = arr->eofb[i];
-                }
-                if ((edge_slice(i) == 2 && edge_slice(arr->ep[i]) != 2) ||
-                    (edge_slice(i) != 2 && edge_slice(arr->ep[i]) == 2)) {
-                        arr->eoud[i] = 1 - arr->eofb[i];
-                } else {
-                        arr->eoud[i] = arr->eofb[i];
-                }
-        }
-}
-void
-fix_cofbcorl(CubeArray *arr)
-{
-        int i;
-        for (i = 0; i < 8; i++) {
-                if (i % 2 == arr->cp[i] % 2) {
-                        arr->cofb[i] = arr->coud[i];
-                        arr->corl[i] = arr->coud[i];
-                } else {
-                        if (arr->cp[i] % 2 == 0) {
-                                arr->cofb[i] = (arr->coud[i]+1)%3;
-                                arr->corl[i] = (arr->coud[i]+2)%3;
-                        } else {
-                                arr->cofb[i] = (arr->coud[i]+2)%3;
-                                arr->corl[i] = (arr->coud[i]+1)%3;
-                        }
-                }
-        }
-}
-Cube
-admissible_ep(Cube cube, PieceFilter f)
-{
-        CubeArray *arr = new_cubearray(cube, f);
-        Cube ret;
-        bool used[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-        int i, j;
-        for (i = 0; i < 12; i++)
-                if (arr->ep[i] != -1)
-                        used[arr->ep[i]] = true;
-        for (i = 0, j = 0; i < 12; i++) {
-                for ( ; j < 11 && used[j]; j++);
-                if (arr->ep[i] == -1)
-                        arr->ep[i] = j++;
-        }
-        ret = arrays_to_cube(arr, pf_ep);
-        free_cubearray(arr, f);
-        return ret;
-}
-int
-edge_slice(Edge e) {
-        if (e < 0 || e > 11)
-                return -1;
-        if (e == FR || e == FL || e == BL || e == BR)
-                return 0;
-        if (e == UR || e == UL || e == DR || e == DL)
-                return 1;
-        return 2;
-}
-int
-piece_orientation(Cube cube, int piece, char *orientation)
-{
-        int arr[12], n, b, x;
-        if (!strcmp(orientation, "eofb")) {
-                x = cube.eofb;
-                n = 12;
-                b = 2;
-        } else if (!strcmp(orientation, "eorl")) {
-                x = cube.eorl;
-                n = 12;
-                b = 2;
-        } else if (!strcmp(orientation, "eoud")) {
-                x = cube.eoud;
-                n = 12;
-                b = 2;
-        } else if (!strcmp(orientation, "coud")) {
-                x = cube.coud;
-                n = 8;
-                b = 3;
-        } else if (!strcmp(orientation, "corl")) {
-                x = cube.corl;
-                n = 8;
-                b = 3;
-        } else if (!strcmp(orientation, "cofb")) {
-                x = cube.cofb;
-                n = 8;
-                b = 3;
-        } else {
-                return -1;
-        }
-        int_to_sum_zero_array(x, b, n, arr);
-        if (piece < n)
-                return arr[piece];
-        return -1;
-}
diff --git a/old/maybe-useful-steps.c b/old/maybe-useful-steps.c
deleted file mode 100644
index 2a20dd9..0000000
--- a/old/maybe-useful-steps.c
+++ /dev/null
@@ -1,1111 +0,0 @@
-#include "steps.h"
-#define UPDATECHECKSTOP(a, b, c)     if ((a=(MAX((a),(b))))>(c)) return (a);
-static int              estimate_stepalt(StepAlt *a, uint64_t *ind);
-/* Checkers and validators ***************************************************/
-/* TODO: these should be with Cube *cube (and all need to change) */
-/* Maybe move them to cube.c */
-static bool             check_centers(Cube cube);
-static bool             check_coud_HTM(Cube cube);
-static bool             check_coud_URF(Cube cube);
-static bool             check_corners_HTM(Cube cube);
-static bool             check_corners_URF(Cube cube);
-static bool             check_cornershtr(Cube cube);
-static bool             check_eofb(Cube cube);
-static bool             check_drud(Cube cube);
-static bool             check_htr(Cube cube);
-static bool             always_valid(Alg *alg);
-static bool             validate_singlecw_ending(Alg *alg);
-/* Messages for when cube is not ready ***************************************/
-static char check_centers_msg[100] = "cube must be oriented (centers solved)";
-static char check_eo_msg[100]      = "EO must be solved on given axis";
-static char check_dr_msg[100]      = "DR must be solved on given axis";
-static char check_htr_msg[100]     = "HTR must be solved";
-static char check_drany_msg[100]   = "DR must be solved on at least one axis";
-/* Steps *********************************************************************/
-/* Optimal solvers *******************/
-Step
-optimal_HTM = {
-        .shortname = "optimal",
-        .name      = "Optimal solve (in HTM)",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_nxopt31_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_nxopt31_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-Step
-optimal_light_HTM = {
-        .shortname = "light",
-        .name      = "Optimal solve (in HTM), small table (500Mb RAM total)",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_light_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_drud_sym16_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-/* Optimal after EO ******************/
-Step
-eofin_eo = {
-        .shortname = "eofin",
-        .name      = "Optimal solve after EO without breaking EO (detected)",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_nxopt31_HTM,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_eofb,
-        .detect    = detect_pretrans_eofb,
-        .tables    = {&pd_nxopt31_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-Step
-eofbfin_eofb = {
-        .shortname = "eofbfin",
-        .name      = "Optimal after EO on F/B without breaking EO",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_nxopt31_HTM,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_eofb,
-        .pre_trans = uf,
-        .tables    = {&pd_nxopt31_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-Step
-eorlfin_eorl = {
-        .shortname = "eorlfin",
-        .name      = "Optimal after EO on R/L without breaking EO",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_nxopt31_HTM,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_eofb,
-        .pre_trans = ur,
-        .tables    = {&pd_nxopt31_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-Step
-eoudfin_eoud = {
-        .shortname = "eoudfin",
-        .name      = "Optimal after EO on U/D without breaking EO",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_nxopt31_HTM,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_eofb,
-        .pre_trans = fd,
-        .tables    = {&pd_nxopt31_HTM, &pd_corners_HTM},
-        .ntables   = 2,
-};
-/* EO steps **************************/
-Step
-eoany_HTM = {
-        .shortname = "eo",
-        .name      = "EO on any axis",
-        .final     = false,
-        .is_done   = check_eofb,
-        .estimate  = estimate_eofb_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .detect    = detect_pretrans_void_3axis,
-        .tables    = {&pd_eofb_HTM},
-        .ntables   = 1,
-};
-Step
-eofb_HTM = {
-        .shortname = "eofb",
-        .name      = "EO on F/B",
-        .final     = false,
-        .is_done   = check_eofb,
-        .estimate  = estimate_eofb_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_eofb_HTM},
-        .ntables   = 1,
-};
-Step
-eorl_HTM = {
-        .shortname = "eorl",
-        .name      = "EO on R/L",
-        .final     = false,
-        .is_done   = check_eofb,
-        .estimate  = estimate_eofb_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = ur,
-        .tables    = {&pd_eofb_HTM},
-        .ntables   = 1,
-};
-Step
-eoud_HTM = {
-        .shortname = "eoud",
-        .name      = "EO on U/D",
-        .final     = false,
-        .is_done   = check_eofb,
-        .estimate  = estimate_eofb_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = fd,
-        .tables    = {&pd_eofb_HTM},
-        .ntables   = 1,
-};
-/* CO steps **************************/
-Step
-coany_HTM = {
-        .shortname = "co",
-        .name      = "CO on any axis",
-        .final     = false,
-        .is_done   = check_coud_HTM,
-        .estimate  = estimate_coud_HTM,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .detect    = detect_pretrans_void_3axis,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-coud_HTM = {
-        .shortname = "coud",
-        .name      = "CO on U/D",
-        .final     = false,
-        .is_done   = check_coud_HTM,
-        .estimate  = estimate_coud_HTM,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-corl_HTM = {
-        .shortname = "corl",
-        .name      = "CO on R/L",
-        .final     = false,
-        .is_done   = check_coud_HTM,
-        .estimate  = estimate_coud_HTM,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = rf,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-cofb_HTM = {
-        .shortname = "cofb",
-        .name      = "CO on F/B",
-        .final     = false,
-        .is_done   = check_coud_HTM,
-        .estimate  = estimate_coud_HTM,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = fd,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-coany_URF = {
-        .shortname = "co-URF",
-        .name      = "CO any axis (URF moveset)",
-        .final     = false,
-        .is_done   = check_coud_URF,
-        .estimate  = estimate_coud_URF,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_URF,
-        .detect    = detect_pretrans_void_3axis,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-coud_URF = {
-        .shortname = "coud-URF",
-        .name      = "CO on U/D (URF moveset)",
-        .final     = false,
-        .is_done   = check_coud_URF,
-        .estimate  = estimate_coud_URF,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_URF,
-        .pre_trans = uf,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-corl_URF = {
-        .shortname = "corl-URF",
-        .name      = "CO on R/L (URF moveset)",
-        .final     = false,
-        .is_done   = check_coud_URF,
-        .estimate  = estimate_coud_URF,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_URF,
-        .pre_trans = rf,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-Step
-cofb_URF = {
-        .shortname = "cofb-URF",
-        .name      = "CO on F/B (URF moveset)",
-        .final     = false,
-        .is_done   = check_coud_URF,
-        .estimate  = estimate_coud_URF,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_URF,
-        .pre_trans = fd,
-        .tables    = {&pd_coud_HTM},
-        .ntables   = 1,
-};
-/* Misc corner steps *****************/
-Step
-cornershtr_HTM = {
-        .shortname = "chtr",
-        .name      = "Solve corners to HTR state",
-        .final     = false,
-        .is_done   = check_cornershtr,
-        .estimate  = estimate_cornershtr_HTM,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_cornershtr_HTM},
-        .ntables   = 1,
-};
-Step
-cornershtr_URF = {
-        .shortname = "chtr-URF",
-        .name      = "Solve corners to HTR state (URF moveset)",
-        .final     = false,
-        .is_done   = check_cornershtr,
-        .estimate  = estimate_cornershtr_URF,
-        .ready     = NULL,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_URF,
-        .pre_trans = uf,
-        .tables    = {&pd_cornershtr_HTM},
-        .ntables   = 1,
-};
-Step
-corners_HTM = {
-        .shortname = "corners",
-        .name      = "Solve corners",
-        .final     = true,
-        .is_done   = check_corners_HTM,
-        .estimate  = estimate_corners_HTM,
-        .ready     = NULL,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_corners_HTM},
-        .ntables   = 1,
-};
-Step
-corners_URF = {
-        .shortname = "corners-URF",
-        .name      = "Solve corners (URF moveset)",
-        .final     = true, /* TODO: check if this works with reorient */
-        .is_done   = check_corners_URF,
-        .estimate  = estimate_corners_URF,
-        .ready     = NULL,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_URF,
-        .pre_trans = uf,
-        .tables    = {&pd_corners_HTM},
-        .ntables   = 1,
-};
-/* DR steps **************************/
-Step
-drany_HTM = {
-        .shortname = "dr",
-        .name      = "DR on any axis",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .detect    = detect_pretrans_void_3axis,
-        .tables    = {&pd_drud_sym16_HTM},
-        .ntables   = 1,
-};
-Step
-drud_HTM = {
-        .shortname = "drud",
-        .name      = "DR on U/D",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = uf,
-        .tables    = {&pd_drud_sym16_HTM},
-        .ntables   = 1,
-};
-Step
-drrl_HTM = {
-        .shortname = "drrl",
-        .name      = "DR on R/L",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = rf,
-        .tables    = {&pd_drud_sym16_HTM},
-        .ntables   = 1,
-};
-Step
-drfb_HTM = {
-        .shortname = "drfb",
-        .name      = "DR on F/B",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_HTM,
-        .ready     = check_centers,
-        .ready_msg = check_centers_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_HTM,
-        .pre_trans = fd,
-        .tables    = {&pd_drud_sym16_HTM},
-        .ntables   = 1,
-};
-/* DR from EO */
-Step
-dr_eo = {
-        .shortname = "dr-eo",
-        .name      = "DR without breaking EO (automatically detected)",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_dr_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .detect    = detect_pretrans_eofb,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-dr_eofb = {
-        .shortname = "dr-eofb",
-        .name      = "DR on U/D or R/L without breaking EO on F/B",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_dr_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = uf,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-dr_eorl = {
-        .shortname = "dr-eorl",
-        .name      = "DR on U/D or F/B without breaking EO on R/L",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_dr_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = ur,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-dr_eoud = {
-        .shortname = "dr-eoud",
-        .name      = "DR on R/L or F/B without breaking EO on U/D",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_dr_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = fd,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drud_eofb = {
-        .shortname = "drud-eofb",
-        .name      = "DR on U/D without breaking EO on F/B",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = uf,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drrl_eofb = {
-        .shortname = "drrl-eofb",
-        .name      = "DR on R/L without breaking EO on F/B",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = rf,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drud_eorl = {
-        .shortname = "drud-eorl",
-        .name      = "DR on U/D without breaking EO on R/L",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = ur,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drfb_eorl = {
-        .shortname = "drfb-eorl",
-        .name      = "DR on F/B without breaking EO on R/L",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = fr,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drfb_eoud = {
-        .shortname = "drfb-eoud",
-        .name      = "DR on F/B without breaking EO on U/D",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = fd,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-Step
-drrl_eoud = {
-        .shortname = "drrl-eoud",
-        .name      = "DR on R/L without breaking EO on U/D",
-        .final     = false,
-        .is_done   = check_drud,
-        .estimate  = estimate_drud_eofb,
-        .ready     = check_eofb,
-        .ready_msg = check_eo_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_eofb,
-        .pre_trans = rd,
-        .tables    = {&pd_drud_eofb},
-        .ntables   = 1,
-};
-/* DR finish steps */
-Step
-dranyfin_DR = {
-        .shortname = "drfin",
-        .name      = "DR finish on any axis without breaking DR",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_drudfin_drud,
-        .ready     = check_drud,
-        .ready_msg = check_drany_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_drud,
-        .detect    = detect_pretrans_drud,
-        .tables    = {&pd_drudfin_noE_sym16_drud},
-        .ntables   = 1,
-};
-Step
-drudfin_drud = {
-        .shortname = "drudfin",
-        .name      = "DR finish on U/D without breaking DR",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_drudfin_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_drud,
-        .pre_trans = uf,
-        .tables    = {&pd_drudfin_noE_sym16_drud},
-        .ntables   = 1,
-};
-Step
-drrlfin_drrl = {
-        .shortname = "drrlfin",
-        .name      = "DR finish on R/L without breaking DR",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_drudfin_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_drud,
-        .pre_trans = rf,
-        .tables    = {&pd_drudfin_noE_sym16_drud},
-        .ntables   = 1,
-};
-Step
-drfbfin_drfb = {
-        .shortname = "drfbfin",
-        .name      = "DR finish on F/B without breaking DR",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_drudfin_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_drud,
-        .pre_trans = fd,
-        .tables    = {&pd_drudfin_noE_sym16_drud},
-        .ntables   = 1,
-};
-/* HTR from DR */
-Step
-htr_any = {
-        .shortname = "htr",
-        .name      = "HTR from DR",
-        .final     = false,
-        .is_done   = check_htr,
-        .estimate  = estimate_htr_drud,
-        .ready     = check_drud,
-        .ready_msg = check_drany_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_drud,
-        .detect    = detect_pretrans_drud,
-        .tables    = {&pd_htr_drud},
-        .ntables   = 1,
-};
-Step
-htr_drud = {
-        .shortname = "htr-drud",
-        .name      = "HTR from DR on U/D",
-        .final     = false,
-        .is_done   = check_htr,
-        .estimate  = estimate_htr_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_drud,
-        .pre_trans = uf,
-        .tables    = {&pd_htr_drud},
-        .ntables   = 1,
-};
-Step
-htr_drrl = {
-        .shortname = "htr-drrl",
-        .name      = "HTR from DR on R/L",
-        .final     = false,
-        .is_done   = check_htr,
-        .estimate  = estimate_htr_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_drud,
-        .pre_trans = rf,
-        .tables    = {&pd_htr_drud},
-        .ntables   = 1,
-};
-Step
-htr_drfb = {
-        .shortname = "htr-drfb",
-        .name      = "HTR from DR on F/B",
-        .final     = false,
-        .is_done   = check_htr,
-        .estimate  = estimate_htr_drud,
-        .ready     = check_drud,
-        .ready_msg = check_dr_msg,
-        .is_valid  = validate_singlecw_ending,
-        .moveset   = &moveset_drud,
-        .pre_trans = fd,
-        .tables    = {&pd_htr_drud},
-        .ntables   = 1,
-};
-/* HTR finish */
-Step
-htrfin_htr = {
-        .shortname = "htrfin",
-        .name      = "HTR finish without breaking HTR",
-        .final     = true,
-        .is_done   = is_solved,
-        .estimate  = estimate_htrfin_htr,
-        .ready     = check_htr,
-        .ready_msg = check_htr_msg,
-        .is_valid  = always_valid,
-        .moveset   = &moveset_htr,
-        .pre_trans = uf,
-        .tables    = {&pd_htrfin_htr},
-        .ntables   = 1,
-};
-Step *steps[] = {
-        &optimal_HTM, /* first is default */
-        &optimal_light_HTM,
-        &eofin_eo,
-        &eofbfin_eofb,
-        &eorlfin_eorl,
-        &eoudfin_eoud,
-        &eoany_HTM,
-        &eofb_HTM,
-        &eorl_HTM,
-        &eoud_HTM,
-        &coany_HTM,
-        &coud_HTM,
-        &corl_HTM,
-        &cofb_HTM,
-        &coany_URF,
-        &coud_URF,
-        &corl_URF,
-        &cofb_URF,
-        &drany_HTM,
-        &drud_HTM,
-        &drrl_HTM,
-        &drfb_HTM,
-        &dr_eo,
-        &dr_eofb,
-        &dr_eorl,
-        &dr_eoud,
-        &drud_eofb,
-        &drrl_eofb,
-        &drud_eorl,
-        &drfb_eorl,
-        &drfb_eoud,
-        &drrl_eoud,
-        &dranyfin_DR,
-        &drudfin_drud,
-        &drrlfin_drrl,
-        &drfbfin_drfb,
-        &htr_any,
-        &htr_drud,
-        &htr_drrl,
-        &htr_drfb,
-        &htrfin_htr,
-        &cornershtr_HTM,
-        &cornershtr_URF,
-        &corners_HTM,
-        &corners_URF,
-        NULL
-};
-/* Checkers and validators ***************************************************/
-static bool
-check_centers(Cube cube)
-{
-        return cube.cpos == 0;
-}
-static bool
-check_coud_HTM(Cube cube)
-{
-        return cube.coud == 0;
-}
-static bool
-check_coud_URF(Cube cube)
-{
-        Cube c2, c3;
-        c2 = apply_move(z, cube);
-        c3 = apply_move(x, cube);
-        return cube.coud == 0 || c2.coud == 0 || c3.coud == 0;
-}
-static bool
-check_corners_URF(Cube cube)
-{
-        Cube c;
-        Trans i;
-        for (i = 0; i < NROTATIONS; i++) {
-                c = apply_alg(rotation_alg(i), cube);
-                if (c.cp && c.coud)
-                        return true;
-        }
-        return false;
-}
-static bool
-check_corners_HTM(Cube cube)
-{
-        return cube.cp == 0 && cube.coud == 0;
-}
-static bool
-check_cornershtr(Cube cube)
-{
-        return coord_cornershtr.index(cube) == 0;
-}
-static bool
-check_eofb(Cube cube)
-{
-        return cube.eofb == 0;
-}
-static bool
-check_drud(Cube cube)
-{
-        return cube.eofb == 0 && cube.eorl == 0 && cube.coud == 0;
-}
-static bool
-check_htr(Cube cube)
-{
-        return check_drud(cube) && coord_htr_drud.index(cube) == 0;
-}
-static bool
-always_valid(Alg *alg)
-{
-        return true;
-}
-static bool
-validate_singlecw_ending(Alg *alg)
-{
-        int i;
-        bool nor, inv;
-        Move l2 = NULLMOVE, l1 = NULLMOVE, l2i = NULLMOVE, l1i = NULLMOVE;
-        for (i = 0; i < alg->len; i++) {
-                if (alg->inv[i]) {
-                        l2i = l1i;
-                        l1i = alg->move[i];
-                } else {
-                        l2 = l1;
-                        l1 = alg->move[i];
-                }
-        }
-        nor = l1 ==base_move(l1)  && (!commute(l1, l2) ||l2 ==base_move(l2));
-        inv = l1i==base_move(l1i) && (!commute(l1i,l2i)||l2i==base_move(l2i));
-        return nor && inv;
-}
-/* Public functions **********************************************************/
-void
-compute_ind(StepAlt *a, Cube *cube, uint64_t *ind)
-{
-}
-int
-estimate_stepalt(StepAlt *a, uint64_t *ind)
-{
-        int i, ret, est[a->n_coord];
-        for (i = 0; i < a->n_coord; i++) {
-                est[i] = ptableval(a->pd[i], ind[i]);
-                if (est[i] == 0 && a->compact_pd[i])
-                        est[i] = ptableval(a->fallback_pd, ind[i] / a->fbmod);
-        }
-        for (i = 0; i < a->n_dbtrick; i++)
-                if (est[a->dbtrick[i][0]] == est[a->dbtrick[i][1]] &&
-                    est[a->dbtrick[i][0]] == est[a->dbtrick[i][2]])
-                        est[a->dbtrick[i][0]] += 1;
-        for (i = 0, ret = -1; i < a->n_coord; i++)
-                ret = max(ret, est[i]);
-        return ret;
-}
-void
-prepare_step(Step *step, SolveOptions *opts)
-{
-        int i, j;
-        PDGenData pdg;
-        StepAlt *a;
-        init_moveset(step->moveset);
-        pdg.moveset = step->moveset;
-        for (i = 0; step->alt[i] != NULL; i++) {
-                a = step->alt[i];
-                for (j = 0; j < a->n_coord; j++) {
-                        gen_coord(a->coord[j]);
-                        pdg.coord   = a->coord[j];
-                        pdg.compact = a->compact[j];
-                        pdg.pd      = NULL;
-                        a->pd[j] = genptable(&pdg, opts->nthreads);
-                        if (a->compact_pd[j]) {
-                                gen_coord(a->fallback_coord[j]);
-                                pdg.coord   = a->fallback_coord[j];
-                                pdg.compact = false;
-                                pdg.pd      = NULL;
-                                a->fallback_pd[j] =
-                                        step->genptable(&pdg, opts->nthreads);
-                        }
-                }
-        }
-}
diff --git a/old/solve_old.c b/old/solve_old.c
deleted file mode 100644
index 8662c9e..0000000
--- a/old/solve_old.c
+++ /dev/null
@@ -1,447 +0,0 @@
-#define SOLVE_C
-#include "solve.h"
-/* Local functions ***********************************************************/
-static void        copy_dfsarg(DfsArg *src, DfsArg *dst);
-static void        dfs(DfsArg *arg);
-static void        dfs_add_sol(DfsArg *arg);
-static void        dfs_niss(DfsArg *arg);
-static bool        dfs_move_checkstop(DfsArg *arg);
-static void *      instance_thread(void *arg);
-static void        multidfs(DfsArg *arg);
-static bool        niss_makes_sense(DfsArg *arg);
-static bool        solvestop(int d, int op, SolveOptions *opts, AlgList *sols);
-/* Local functions ***********************************************************/
-static void
-copy_dfsarg(DfsArg *src, DfsArg *dst)
-{
-        int i;
-        dst->cube        = src->cube;
-        dst->t           = src->t;
-        dst->s           = src->s;
-        dst->opts        = src->opts;
-        dst->d           = src->d;
-        dst->bound       = src->bound; /* In theory not needed */
-        dst->niss        = src->niss;
-        dst->sols        = src->sols;
-        dst->sols_mutex  = src->sols_mutex;
-        dst->current_alg = src->current_alg;
-        for (i = 0; i < src->s->n_coord; i++) {
-                dst->ind[i].val = src->ind[i].val;
-                dst->ind[i].t   = src->ind[i].t;
-        }
-        src->s->copy_extra(src, dst);
-}
-static void
-dfs(DfsArg *arg)
-{
-        int i;
-        Move m, l0, l1;
-        DfsArg newarg;
-        if (dfs_move_checkstop(arg))
-                return;
-        if (arg->bound == 0) {
-                if (arg->current_alg->len == arg->d)
-                        dfs_add_sol(arg);
-                return;
-        }
-        for (i = 0; arg->s->moveset->sorted_moves[i] != NULLMOVE; i++) {
-                m = arg->s->moveset->sorted_moves[i];
-                if (arg->s->moveset->can_append(arg->current_alg, m, arg->niss)
-                    && compare_last(arg->current_alg, m, arg->niss) >= 0) {
-                        copy_dfsarg(arg, &newarg);
-                        append_move(arg->current_alg, m, newarg.niss);
-                        dfs(&newarg);
-                        remove_last_move(arg->current_alg);
-                }
-        }
-        if (niss_makes_sense(arg))
-                dfs_niss(arg);
-}
-static void
-dfs_add_sol(DfsArg *arg)
-{
-        bool valid, accepted, nisscanc;
-        valid = arg->s->is_valid==NULL || arg->s->is_valid(arg->current_alg);
-        accepted = valid || arg->opts->all;
-        nisscanc = arg->s->final &&
-            arg->s->moveset->cancel_niss(arg->current_alg);
-        if (accepted && !nisscanc) {
-                pthread_mutex_lock(arg->sols_mutex);
-                if (arg->sols->len < arg->opts->max_solutions) {
-                        append_alg(arg->sols, arg->current_alg);
-                        transform_alg(
-                            inverse_trans(arg->t), arg->sols->last->alg);
-                        if (arg->opts->verbose)
-                                print_alg(arg->sols->last->alg, false);
-                }
-                pthread_mutex_unlock(arg->sols_mutex);
-        }
-}
-static void
-dfs_niss(DfsArg *arg)
-{
-        DfsArg newarg;
-        Alg *inv;
-        Cube *c;
-        copy_dfsarg(arg, &newarg);
-        /* Invert current alg and scramble */
-        newarg.cube = malloc(sizeof(Cube));
-        inv = inverse_alg(arg->current_alg);
-        c = malloc(sizeof(Cube));
-        make_solved(newarg.cube);
-        apply_alg(inv, newarg.cube);
-        copy_cube(arg->cube, c);
-        invert_cube(c);
-        compose(c, newarg.cube);
-        /* New indexes */
-        compute_ind(newarg.s, newarg.cube, newarg.ind);
-        newarg.niss = !(arg->niss);
-        dfs(&newarg);
-        free_alg(inv);
-        free(c);
-        free(newarg.cube);
-}
-static bool
-dfs_move_checkstop(DfsArg *arg)
-{
-        int i, goal, nsols;
-        Move mm;
-        Trans tt = uf; /* Avoid uninitialized warning */
-        /* Moving and computing bound */
-        arg->bound = 0;
-        goal = arg->d - arg->current_alg->len;
-        for (i = 0; i < arg->s->n_coord; i++) {
-                if (arg->last[0] != NULLMOVE) {
-                        mm = transform_move(arg->ind[i].t, arg->last[0]);
-                        arg->ind[i].val = move_coord(arg->s->coord[i],
-                            mm, arg->ind[i].val, &tt);
-                        arg->ind[i].t = transform_trans(tt, arg->ind[i].t);
-                }
-                arg->bound =
-                    MAX(arg->bound, ptableval(arg->s->pd[i], arg->ind[i].val));
-                if (arg->opts->can_niss && !arg->niss)
-                        arg->bound = MIN(1, arg->bound);
-                if (arg->bound > goal)
-                        return true;
-        }
-        pthread_mutex_lock(arg->sols_mutex);
-        nsols = arg->sols->len;
-        pthread_mutex_unlock(arg->sols_mutex);
-        return nsols >= arg->opts->max_solutions;
-}
-static void *
-instance_thread(void *arg)
-{
-        bool b, inv;
-        Cube c;
-        Move m;
-        ThreadDataSolve *td;
-        AlgListNode *node;
-        DfsArg darg;
-        td = (ThreadDataSolve *)arg;
-        while (1) {
-                b = false;
-                pthread_mutex_lock(td->start_mutex);
-                if ((node = *(td->node)) == NULL)
-                        b = true;
-                else
-                        *(td->node) = (*(td->node))->next;
-                pthread_mutex_unlock(td->start_mutex);
-                if (b)
-                        break;
-                inv = node->alg->inv[0];
-                m = node->alg->move[0];
-                copy_cube(td->arg.cube, &c);
-                if (inv)
-                        invert_cube(&c);
-                copy_dfsarg(&td->arg, &darg);
-                compute_ind(td->arg.s, &c, darg.ind);
-                darg.cube            = &c;
-                darg.niss            = inv;
-                darg.current_alg     = new_alg("");
-                append_move(darg.current_alg, m, inv);
-                dfs(&darg);
-                free_alg(darg.current_alg);
-        }
-        return NULL;
-}
-static void
-multidfs(DfsArg *arg)
-{
-        int i;
-        Cube local_cube;
-        Alg *alg;
-        AlgList *start;
-        AlgListNode **node;
-        pthread_t t[arg->opts->nthreads];
-        ThreadDataSolve td[arg->opts->nthreads];
-        pthread_mutex_t *start_mutex, *sols_mutex;
-        node        = malloc(sizeof(AlgListNode *));
-        start_mutex = malloc(sizeof(pthread_mutex_t));
-        sols_mutex  = malloc(sizeof(pthread_mutex_t));
-        start = new_alglist();
-        pthread_mutex_init(start_mutex, NULL);
-        pthread_mutex_init(sols_mutex,  NULL);
-        for (i = 0; arg->s->moveset->sorted_moves[i] != NULLMOVE; i++) {
-                alg = new_alg("");
-                append_move(alg, arg->s->moveset->sorted_moves[i], false);
-                append_alg(start, alg);
-                if (arg->opts->can_niss && !arg->s->final) {
-                        alg->inv[0] = true;
-                        append_alg(start, alg);
-                }
-                free_alg(alg);
-        }
-        *node = start->first;
-        copy_cube(arg->cube, &local_cube);
-        for (i = 0; i < arg->opts->nthreads; i++) {
-                copy_dfsarg(arg, &(td[i].arg));
-                td[i].arg.cube       = &local_cube;
-                td[i].arg.sols_mutex = sols_mutex;
-                td[i].thid           = i;
-                td[i].start          = start;
-                td[i].node           = node;
-                td[i].start_mutex    = start_mutex;
-                pthread_create(&t[i], NULL, instance_thread, &td[i]);
-        }
-        for (i = 0; i < arg->opts->nthreads; i++)
-                pthread_join(t[i], NULL);
-        free_alglist(start);
-        free(node);
-        free(start_mutex);
-        free(sols_mutex);
-}
-static bool
-niss_makes_sense(DfsArg *arg)
-{
-        Move m, mm;
-        uint64_t u;
-        int i;
-        if (arg->s->final || arg->niss || !arg->opts->can_niss)
-                return false;
-        if (arg->current_alg->len_normal == 0)
-                return true;
-        m = inverse_move(arg->last[0]);
-        for (i = 0; i < arg->s->n_coord; i++) {
-                mm = transform_move(arg->ind[i].t, m);
-                u = move_coord(arg->s->coord[i], mm, 0, NULL);
-                if (ptableval(arg->s->pd[i], u) > 0)
-                        return true;
-        }
-        
-        return false;
-}
-static bool
-solvestop(int d, int op, SolveOptions *opts, AlgList *sols)
-{
-        bool opt_done, max_moves_exceeded, max_sols_exceeded;
-        opt_done = opts->optimal != -1 && op != -1 && d > opts->optimal + op;
-        max_moves_exceeded = d > opts->max_moves;
-        max_sols_exceeded = sols->len >= opts->max_solutions;
-        return opt_done || max_moves_exceeded || max_sols_exceeded;
-}
-/* Public functions **********************************************************/
-AlgList *
-solve(Cube *cube, ChoiceStep *cs, SolveOptions *opts)
-{
-        int i, j, d, op, est;
-        bool ready[99], one_ready, zerosol;
-        Movable ind[99][10];
-        AlgList *s;
-        Cube *c[99];
-        DfsArg arg[99];
-        prepare_cs(cs, opts);
-        s = new_alglist();
-        for (i = 0, one_ready = false; cs->step[i] != NULL; i++) {
-                c[i] = malloc(sizeof(Cube));
-                copy_cube(cube, c[i]);
-                apply_trans(cs->t[i], c[i]);
-                arg[i].cube = c[i];
-                arg[i].t    = cs->t[i];
-                arg[i].s    = cs->step[i];
-                arg[i].opts = opts;
-                arg[i].sols = s;
-                if ((ready[i] = cs->step[i]->ready(c[i]))) {
-                        one_ready = true;
-                        /* Only for local use for 0 moves solutions */
-                        compute_ind(cs->step[i], c[i], ind[i]);
-                }
-        }
-        if (!one_ready) {
-                fprintf(stderr, "Cube not ready for solving step: ");
-                fprintf(stderr, "%s\n", cs->ready_msg);
-                return s;
-        }
-        /* If the empty moves sequence is a solution for one of the
-         * alternatives, all longer solutions will be discarded, so we may
-         * just set its ready[] value to false. If the solution is accepted
-         * we append it and start searching from d = 1. */
-        for (i = 0, zerosol = false; cs->step[i] != NULL; i++) {
-                if (ready[i]) {
-                        est = 0;
-                        for (j = 0; j < cs->step[i]->n_coord; j++)
-                                est = MAX(est, ptableval(cs->step[i]->pd[j],
-                                    ind[i][j].val));
-                        if (est == 0) {
-                                ready[i] = false;
-                                zerosol = true;
-                        }
-                }
-        }
-        if (zerosol && opts->min_moves == 0) {
-                append_alg(s, new_alg(""));
-                opts->min_moves = 1;
-                if (opts->verbose)
-                        printf("Step is already solved"
-                            "(empty alg is a solution)\n");
-        }
-        for (d = opts->min_moves, op = -1; !solvestop(d, op, opts, s); d++) {
-                if (opts->verbose)
-                        fprintf(stderr, "Searching depth %d\n", d);
-                for (i=0; cs->step[i]!=NULL && !solvestop(d,op,opts,s); i++) {
-                        if (!ready[i])
-                                continue;
-                        arg[i].d = d;
-                        multidfs(&arg[i]);
-                        if (s->len > 0 && op == -1)
-                                op = d;
-                }
-        }
-        for (i = 0; cs->step[i] != NULL; i++)
-                free(c[i]);
-        return s;
-}
-/* TODO: make more general! */
-Alg *
-solve_2phase(Cube *cube, int nthreads)
-{
-        int bestlen, newb;
-        Alg *bestalg, *ret;
-        AlgList *sols1, *sols2;
-        AlgListNode *i;
-        Cube c;
-        SolveOptions opts1, opts2;
-        opts1.min_moves     = 0;
-        opts1.max_moves     = 13;
-        opts1.max_solutions = 20;
-        opts1.nthreads      = nthreads;
-        opts1.optimal       = 3;
-        opts1.can_niss      = false;
-        opts1.verbose       = false;
-        opts1.all           = true;
-        opts2.min_moves     = 0;
-        opts2.max_moves     = 19;
-        opts2.max_solutions = 1;
-        opts2.nthreads      = nthreads;
-        opts2.can_niss      = false;
-        opts2.verbose       = false;
-        /* We skip step1 if it is solved on U/D */
-        if (check_drud(cube)) {
-                sols1 = new_alglist();
-                append_alg(sols1, new_alg(""));
-        } else {
-                sols1 = solve(cube, &drud_HTM, &opts1);
-        }
-        bestalg = new_alg("");
-        bestlen = 999;
-        for (i = sols1->first; i != NULL; i = i->next) {
-                copy_cube(cube, &c);
-                apply_alg(i->alg, &c);
-                sols2 = solve(&c, &dranyfin_DR, &opts2);
-                
-                if (sols2->len > 0) {
-                        newb = i->alg->len + sols2->first->alg->len;
-                        if (newb < bestlen) {
-                                bestlen = newb;
-                                copy_alg(i->alg, bestalg);
-                                compose_alg(bestalg, sols2->first->alg);
-                        }
-                }
-                free_alglist(sols2);
-        }
-        free_alglist(sols1);
-        ret = cleanup(bestalg);
-        free_alg(bestalg);
-        return ret;
-}
diff --git a/old/solve_old.h b/old/solve_old.h
deleted file mode 100644
index 010389e..0000000
--- a/old/solve_old.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef SOLVE_H
-#define SOLVE_H
-#include "movesets.h"
-AlgList *   solve(Cube *cube, ChoiceStep *cs, SolveOptions *opts);
-Alg *       solve_2phase(Cube *cube, int nthreads);
-#endif
diff --git a/src/alg.c b/src/alg.c
deleted file mode 100644
index d806178..0000000
--- a/src/alg.c
+++ /dev/null
@@ -1,459 +0,0 @@
-#define ALG_C
-#include "alg.h"
-static int         axis(Move m);
-static void        free_alglistnode(AlgListNode *aln);
-static void        realloc_alg(Alg *alg, int n);
-void
-append_alg(AlgList *l, Alg *alg)
-{
-        AlgListNode *node = malloc(sizeof(AlgListNode));
-        int i;
-        node->alg = new_alg("");
-        for (i = 0; i < alg->len; i++)
-                append_move(node->alg, alg->move[i], alg->inv[i]);
-        node->next = NULL;
-        if (++l->len == 1)
-                l->first = node;
-        else
-                l->last->next = node;
-        l->last = node;
-}
-void
-append_move(Alg *alg, Move m, bool inverse)
-{
-        if (alg->len == alg->allocated)
-                realloc_alg(alg, 2*alg->len);
-        alg->move[alg->len] = m;
-        alg->inv [alg->len] = inverse;
-        alg->len++;
-        if (inverse)
-                alg->move_inverse[alg->len_inverse++] = m;
-        else
-                alg->move_normal[alg->len_normal++] = m;
-}
-static int
-axis(Move m)
-{
-        static int aux[] = {
-                [NULLMOVE] = 0,
-                [U]  = 1, [U2]  = 1, [U3]  = 1,
-                [D]  = 1, [D2]  = 1, [D3]  = 1,
-                [Uw] = 1, [Uw2] = 1, [Uw3] = 1,
-                [Dw] = 1, [Dw2] = 1, [Dw3] = 1,
-                [E]  = 1, [E2]  = 1, [E3]  = 1,
-                [y]  = 1, [y2]  = 1, [y3]  = 1,
-                [R]  = 2, [R2]  = 2, [R3]  = 2,
-                [L]  = 2, [L2]  = 2, [L3]  = 2,
-                [Rw] = 2, [Rw2] = 2, [Rw3] = 2,
-                [Lw] = 2, [Lw2] = 2, [Lw3] = 2,
-                [M]  = 2, [M2]  = 2, [M3]  = 2,
-                [x]  = 2, [x2]  = 2, [x3]  = 2,
-                [F]  = 3, [F2]  = 3, [F3]  = 3,
-                [B]  = 3, [B2]  = 3, [B3]  = 3,
-                [Fw] = 3, [Fw2] = 3, [Fw3] = 3,
-                [Bw] = 3, [Bw2] = 3, [Bw3] = 3,
-                [S]  = 3, [S2]  = 3, [S3]  = 3,
-                [z]  = 3, [z2]  = 3, [z3]  = 3,
-        };
-        return aux[m];
-}
-Move
-base_move(Move m)
-{
-        if (m == NULLMOVE)
-                return NULLMOVE;
-        else
-                return m - (m-1)%3;
-}
-bool
-commute(Move m1, Move m2)
-{
-        return axis(m1) == axis(m2);
-}
-int
-compare(Move m1, Move m2)
-{
-        if (!commute(m1, m2))
-                return 0;
-        return m1 < m2 ? 1 : -1;
-}
-int
-compare_last(Alg *alg, Move m, bool inverse)
-{
-        Move last;
-        int n;
-        if (inverse) {
-                n = alg->len_inverse;
-                last = n > 0 ? alg->move_inverse[n-1] : NULLMOVE;
-        } else {
-                n = alg->len_normal;
-                last = n > 0 ? alg->move_normal[n-1] : NULLMOVE;
-        }
-        return compare(last, m);
-}
-void
-compose_alg(Alg *alg1, Alg *alg2)
-{
-        int i;
-        for (i = 0; i < alg2->len; i++)
-                append_move(alg1, alg2->move[i], alg2->inv[i]);
-}
-void
-copy_alg(Alg *src, Alg *dst)
-{
-        dst->len = dst->len_normal = dst->len_inverse = 0;
-        compose_alg(dst, src);
-}
-void
-free_alg(Alg *alg)
-{
-        free(alg->move);
-        free(alg->inv);
-        free(alg);
-}
-void
-free_alglist(AlgList *l)
-{
-        AlgListNode *aux, *i = l->first;
-        while (i != NULL) {
-                aux = i->next;
-                free_alglistnode(i);
-                i = aux;
-        }
-        free(l);
-}
-static void
-free_alglistnode(AlgListNode *aln)
-{
-        free_alg(aln->alg);
-        free(aln);
-}
-Alg *
-inverse_alg(Alg *alg)
-{
-        Alg *ret = new_alg("");
-        int i;
-        for (i = alg->len-1; i >= 0; i--)
-                append_move(ret, inverse_move(alg->move[i]), alg->inv[i]);
-        return ret;
-}
-Move
-inverse_move(Move m)
-{
-        return m == NULLMOVE ? NULLMOVE : m + 2 - 2*((m-1) % 3);
-}
-char *
-move_string(Move m)
-{
-        static char move_string_aux[NMOVES][7] = {
-                [NULLMOVE] = "-",
-                [U]  = "U",  [U2]  = "U2",  [U3]  = "U\'",
-                [D]  = "D",  [D2]  = "D2",  [D3]  = "D\'",
-                [R]  = "R",  [R2]  = "R2",  [R3]  = "R\'",
-                [L]  = "L",  [L2]  = "L2",  [L3]  = "L\'",
-                [F]  = "F",  [F2]  = "F2",  [F3]  = "F\'",
-                [B]  = "B",  [B2]  = "B2",  [B3]  = "B\'",
-                [Uw] = "Uw", [Uw2] = "Uw2", [Uw3] = "Uw\'",
-                [Dw] = "Dw", [Dw2] = "Dw2", [Dw3] = "Dw\'",
-                [Rw] = "Rw", [Rw2] = "Rw2", [Rw3] = "Rw\'",
-                [Lw] = "Lw", [Lw2] = "Lw2", [Lw3] = "Lw\'",
-                [Fw] = "Fw", [Fw2] = "Fw2", [Fw3] = "Fw\'",
-                [Bw] = "Bw", [Bw2] = "Bw2", [Bw3] = "Bw\'",
-                [M]  = "M",  [M2]  = "M2",  [M3]  = "M\'",
-                [E]  = "E",  [E2]  = "E2",  [E3]  = "E\'",
-                [S]  = "S",  [S2]  = "S2",  [S3]  = "S\'",
-                [x]  = "x",  [x2]  = "x2",  [x3]  = "x\'",
-                [y]  = "y",  [y2]  = "y2",  [y3]  = "y\'",
-                [z]  = "z",  [z2]  = "z2",  [z3]  = "z\'",
-        };
-        return move_string_aux[m];
-}
-Alg *
-new_alg(char *str)
-{
-        Alg *alg;
-        int i;
-        bool niss, move_read;
-        Move j, m;
-        alg = malloc(sizeof(Alg));
-        alg->allocated    = 30;
-        alg->move         = malloc(alg->allocated * sizeof(Move));
-        alg->inv          = malloc(alg->allocated * sizeof(bool));
-        alg->move_normal  = malloc(alg->allocated * sizeof(Move));
-        alg->move_inverse = malloc(alg->allocated * sizeof(Move));
-        alg->len          = 0;
-        alg->len_normal   = 0;
-        alg->len_inverse  = 0;
-        niss = false;
-        for (i = 0; str[i]; i++) {
-                if (str[i] == ' ' || str[i] == '\t' || str[i] == '\n')
-                        continue;
-                if (str[i] == '(' && niss) {
-                        fprintf(stderr, "Error reading moves: nested ( )\n");
-                        alg->len = alg->len_normal = alg->len_inverse = 0;
-                        return alg;
-                }
-                if (str[i] == ')' && !niss) {
-                        fprintf(stderr, "Error reading moves: unmatched )\n");
-                        alg->len = alg->len_normal = alg->len_inverse = 0;
-                        return alg;
-                }
-                if (str[i] == '(' || str[i] == ')') {
-                        niss = !niss;
-                        continue;
-                }
-                /* Single slash for comments */
-                if (str[i] == '/') {
-                        while (str[i] && str[i] != '\n')
-                                i++;
-                        if (!str[i])
-                                i--;
-                        continue;
-                }
-                move_read = false;
-                for (j = U; j < NMOVES; j++) {
-                        if (str[i] == move_string(j)[0] ||
-                            (str[i] >= 'a' && str[i] <= 'z' &&
-                             str[i] == move_string(j)[0]-('A'-'a') && j<=B)) {
-                                m = j;
-                                if (str[i] >= 'a' && str[i] <= 'z' && j<=B) {
-                                        m += Uw - U;
-                                }
-                                if (m <= B && str[i+1]=='w') {
-                                        m += Uw - U;
-                                        i++;
-                                }
-                                if (str[i+1]=='2') {
-                                        m += 1;
-                                        i++;
-                                } else if (str[i+1] == '\'' ||
-                                           str[i+1] == '3'  ||
-                                           str[i+1] == '`' ) {
-                                        m += 2;
-                                        i++;
-                                } else if ((int)str[i+1] == -62 &&
-                                           (int)str[i+2] == -76) {
-                                        /* Weird apostrophe */
-                                        m += 2;
-                                        i += 2;
-                                } else if ((int)str[i+1] == -30 &&
-                                           (int)str[i+2] == -128 &&
-                                           (int)str[i+3] == -103) {
-                                        /* MacOS apostrophe */
-                                        m += 2;
-                                        i += 3;
-                                }
-                                append_move(alg, m, niss);
-                                move_read = true;
-                                break;
-                        }
-                }
-                if (!move_read) {
-                        free(alg);
-                        return new_alg("");
-                }
-        }
-        if (niss) {
-                fprintf(stderr, "Error reading moves: unmatched (\n");
-                alg->len = alg->len_normal = alg->len_inverse = 0;
-        }
-        return alg;
-}
-AlgList *
-new_alglist()
-{
-        AlgList *ret = malloc(sizeof(AlgList));
-        ret->len   = 0;
-        ret->first = NULL;
-        ret->last  = NULL;
-        return ret;
-}
-Alg *
-on_inverse(Alg *alg)
-{
-        Alg *ret = new_alg("");
-        int i;
-        for (i = 0; i < alg->len; i++)
-                append_move(ret, alg->move[i], !alg->inv[i]);
-        return ret;
-}
-void
-print_alg(Alg *alg, bool l)
-{
-        char fill[4];
-        int i;
-        bool niss = false;
-        for (i = 0; i < alg->len; i++) {
-                if (!niss && alg->inv[i])
-                        strcpy(fill, i == 0 ? "(" : " (");
-                if (niss && !alg->inv[i])
-                        strcpy(fill, ") ");
-                if (niss == alg->inv[i])
-                        strcpy(fill, i == 0 ? "" : " ");
-                printf("%s%s", fill, move_string(alg->move[i]));
-                niss = alg->inv[i];
-        }
-        if (niss)
-                printf(")");
-        if (l)
-                printf(" (%d)", alg->len);
-        printf("\n");
-}
-void
-print_alglist(AlgList *al, bool l)
-{
-        AlgListNode *i;
-        for (i = al->first; i != NULL; i = i->next)
-                print_alg(i->alg, l);
-}
-static void
-realloc_alg(Alg *alg, int n)
-{
-        if (alg == NULL) {
-                fprintf(stderr, "Error: trying to reallocate NULL alg.\n");
-                return;
-        }
-        if (n < alg->len) {
-                fprintf(stderr, "Error: alg too long for reallocation ");
-                fprintf(stderr, "(%d vs %d)\n", alg->len, n);
-                return;
-        }
-        if (n > 1000000) {
-                fprintf(stderr, "Warning: very long alg,");
-                fprintf(stderr, "something might go wrong.\n");
-        }
-        alg->move         = realloc(alg->move,         n * sizeof(int));
-        alg->inv          = realloc(alg->inv,          n * sizeof(int));
-        alg->move_normal  = realloc(alg->move_normal,  n * sizeof(int));
-        alg->move_inverse = realloc(alg->move_inverse, n * sizeof(int));
-        alg->allocated = n;
-}
-void
-remove_last_move(Alg *a)
-{
-        a->len--;
-        if (a->inv[a->len])
-                a->len_inverse--;
-        else
-                a->len_normal--;
-}
-void
-swapmove(Move *m1, Move *m2)
-{
-        Move aux;
-        aux = *m1;
-        *m1 = *m2;
-        *m2 = aux;
-}
-char *
-trans_string(Trans t)
-{
-        static char trans_string_aux[NTRANS][20] = {
-                [uf]  = "uf",  [ur]  = "ur", [ub] = "ub", [ul] = "ul",
-                [df]  = "df",  [dr]  = "dr", [db] = "db", [dl] = "dl",
-                [rf]  = "rf",  [rd]  = "rd", [rb] = "rb", [ru] = "ru",
-                [lf]  = "lf",  [ld]  = "ld", [lb] = "lb", [lu] = "lu",
-                [fu]  = "fu",  [fr]  = "fr", [fd] = "fd", [fl] = "fl",
-                [bu]  = "bu",  [br]  = "br", [bd] = "bd", [bl] = "bl",
-                [uf_mirror] = "uf*", [ur_mirror] = "ur*",
-                [ub_mirror] = "ub*", [ul_mirror] = "ul*",
-                [df_mirror] = "df*", [dr_mirror] = "dr*",
-                [db_mirror] = "db*", [dl_mirror] = "dl*",
-                [rf_mirror] = "rf*", [rd_mirror] = "rd*",
-                [rb_mirror] = "rb*", [ru_mirror] = "ru*",
-                [lf_mirror] = "lf*", [ld_mirror] = "ld*",
-                [lb_mirror] = "lb*", [lu_mirror] = "lu*",
-                [fu_mirror] = "fu*", [fr_mirror] = "fr*",
-                [fd_mirror] = "fd*", [fl_mirror] = "fl*",
-                [bu_mirror] = "bu*", [br_mirror] = "br*",
-                [bd_mirror] = "bd*", [bl_mirror] = "bl*",
-        };
-        return trans_string_aux[t];
-}
-Alg *
-unniss(Alg *alg)
-{
-        int i;
-        Alg *ret;
-        ret = new_alg("");
-        for (i = 0; i < alg->len_normal; i++)
-                append_move(ret, alg->move_normal[i], false);
-        for (i = 0; i < alg->len_inverse; i++)
-                append_move(ret, inverse_move(alg->move_inverse[i]), false);
-        return ret;
-}
diff --git a/src/alg.h b/src/alg.h
deleted file mode 100644
index 967cd92..0000000
--- a/src/alg.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#ifndef ALG_H
-#define ALG_H
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "cubetypes.h"
-#include "utils.h"
-void        append_alg(AlgList *l, Alg *alg);
-void        append_move(Alg *alg, Move m, bool inverse);
-Move        base_move(Move m);
-int         compare(Move m1, Move m2); /* Return 1 (m1<m2), 0 or -1 (m1>m2) */
-int         compare_last(Alg *alg, Move m, bool inverse);
-void        compose_alg(Alg *alg1, Alg *alg2);
-bool        commute(Move m1, Move m2);
-void        copy_alg(Alg *src, Alg *dst);
-void        free_alg(Alg *alg);
-void        free_alglist(AlgList *l);
-Alg *       inverse_alg(Alg *alg);
-Move        inverse_move(Move m);
-char *      move_string(Move m);
-Alg *       new_alg(char *str);
-AlgList *   new_alglist();
-Alg *       on_inverse(Alg *alg);
-void        print_alg(Alg *alg, bool l);
-void        print_alglist(AlgList *al, bool l);
-void        remove_last_move(Alg *alg);
-void        swapmove(Move *m1, Move *m2);
-char *      trans_string(Trans t); /* Here because similar to move_string, move? */
-Alg *       unniss(Alg *alg);
-#endif
diff --git a/src/commands.c b/src/commands.c
deleted file mode 100644
index a9e8fc9..0000000
--- a/src/commands.c
+++ /dev/null
@@ -1,569 +0,0 @@
-#define COMMANDS_C
-#include "commands.h"
-static bool             read_cs(CommandArgs *args, char *str);
-static bool             read_scrtype(CommandArgs *args, char *str);
-static bool             read_scramble(int c, char **v, CommandArgs *args);
-/* Arg parsing functions implementation **************************************/
-CommandArgs *
-solve_parse_args(int c, char **v)
-{
-        int i;
-        bool infinitesols, fixedmsols;
-        long val;
-        CommandArgs *a = new_args();
-        a->opts->min_moves     = 0;
-        a->opts->max_moves     = 20;
-        a->opts->max_solutions = 1;
-        a->opts->nthreads      = 1;
-        a->opts->optimal       = -1;
-        a->opts->can_niss      = false;
-        a->opts->verbose       = false;
-        a->opts->all           = false;
-        a->opts->print_number  = true;
-        a->opts->count_only    = false;
-        fixedmsols = false;
-        infinitesols = false;
-        for (i = 0; i < c; i++) {
-                if (!strcmp(v[i], "-m") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 0 || val > 100) {
-                                fprintf(stderr,
-                                        "Invalid min number of moves"
-                                        "(0 <= N <= 100).\n");
-                                return a;
-                        }
-                        a->opts->min_moves = val;
-                } else if (!strcmp(v[i], "-M") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 0 || val > 100) {
-                                fprintf(stderr,
-                                        "Invalid max number of moves"
-                                        "(0 <= N <= 100).\n");
-                                return a;
-                        }
-                        a->opts->max_moves = val;
-                        infinitesols = true;
-                } else if (!strcmp(v[i], "-t") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 1 || val > 64) {
-                                fprintf(stderr,
-                                        "Invalid number of threads."
-                                        "1 <= t <= 64\n");
-                                return a;
-                        }
-                        a->opts->nthreads = val;
-                } else if (!strcmp(v[i], "-n") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 1 || val > 1000000) {
-                                fprintf(stderr,
-                                        "Invalid number of solutions.\n");
-                                return a;
-                        }
-                        a->opts->max_solutions = val;
-                        fixedmsols = true;
-                } else if (!strcmp(v[i], "-o")) {
-                        a->opts->optimal = 0;
-                        infinitesols = true;
-                } else if (!strcmp(v[i], "-O") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 0 || val > 100 ||
-                            (val == 0 && strcmp("0", v[i]))) {
-                                fprintf(stderr,
-                                        "Invalid max number of moves"
-                                        " (0 <= N <= 100).\n");
-                                return a;
-                        }
-                        a->opts->optimal = val;
-                        infinitesols = true;
-                } else if (!strcmp(v[i], "-N")) {
-                        a->opts->can_niss = true;
-                } else if (!strcmp(v[i], "-i")) {
-                        a->scrstdin = true;
-                } else if (!strcmp(v[i], "-v")) {
-                        a->opts->verbose = true;
-                } else if (!strcmp(v[i], "-a")) {
-                        a->opts->all = true;
-                } else if (!strcmp(v[i], "-p")) {
-                        a->opts->print_number = false;
-                } else if (!strcmp(v[i], "-c")) {
-                        a->opts->count_only = true;
-                } else if (!read_cs(a, v[i])) {
-                        break;
-                }
-        }
-        if (infinitesols && !fixedmsols)
-                a->opts->max_solutions = 1000000; /* 1M = +infty */
-        a->success = (a->scrstdin && i == c) || read_scramble(c-i, &v[i], a);
-        return a;
-}
-CommandArgs *
-scramble_parse_args(int c, char **v)
-{
-        int i;
-        long val;
-        CommandArgs *a = new_args();
-        a->success = true;
-        a->n       = 1;
-        for (i = 0; i < c; i++) {
-                if (!strcmp(v[i], "-n") && i+1 < c) {
-                        val = strtol(v[++i], NULL, 10);
-                        if (val < 1 || val > 1000000) {
-                                fprintf(stderr,
-                                        "Invalid number of scrambles.\n");
-                                a->success = false;
-                                return a;
-                        }
-                        a->n = val;
-                } else if (!read_scrtype(a, v[i])) {
-                        a->success = false;
-                        return a;
-                }
-        }
-        return a;
-}
-CommandArgs *
-gen_parse_args(int c, char **v)
-{
-        int val;
-        CommandArgs *a = new_args();
-        a->opts->nthreads = 64;
-        a->success  = false;
-        if (c == 0) {
-                a->success = true;
-        } else {
-                if (!strcmp(v[0], "-t") && c > 1) {
-                        val = strtol(v[1], NULL, 10);
-                        if (val < 1 || val > 64) {
-                                fprintf(stderr,
-                                        "Invalid number of threads."
-                                        "1 <= t <= 64\n");
-                                return a;
-                        }
-                        a->opts->nthreads = val;
-                        a->success = true;
-                }
-        }
-        
-        return a;
-}
-CommandArgs *
-help_parse_args(int c, char **v)
-{
-        int i;
-        CommandArgs *a = new_args();
-        if (c == 1) {
-                for (i = 0; commands[i] != NULL; i++)
-                        if (!strcmp(v[0], commands[i]->name))
-                                a->command = commands[i];
-                if (a->command == NULL)
-                        fprintf(stderr, "%s: command not found\n", v[0]);
-        }
-        a->success = c == 0 || (c == 1 && a->command != NULL);
-        return a;
-}
-CommandArgs *
-parse_only_scramble(int c, char **v)
-{
-        CommandArgs *a = new_args();
-        if (!strcmp(v[0], "-i")) {
-                a->scrstdin = true;
-                a->success = c == 1;
-        } else {
-                a->success = read_scramble(c, v, a);
-        }
-        return a;
-}
-CommandArgs *
-parse_no_arg(int c, char **v)
-{
-        CommandArgs *a = new_args();
-        a->success = true;
-        return a;
-}
-/* Exec functions implementation *********************************************/
-void
-solve_exec(CommandArgs *args)
-{
-        Cube c;
-        AlgList *sols;
-        Solver *solver[99];
-        Threader *threader;
-        make_solved(&c);
-        apply_alg(args->scramble, &c);
-/* TODO: adjust */
-/*      threader = &threader_single;*/
-        threader = &threader_eager;
-/* TODO: adjust */
-        int i;
-        for (i = 0; args->cs->step[i] != NULL; i++)
-                solver[i] = new_stepsolver_lazy(args->cs->step[i]);
-        solver[i] = NULL;
-        sols = solve(&c, args->opts, solver, threader);
-        if (args->opts->count_only)
-                printf("%d\n", sols->len);
-        else
-                print_alglist(sols, args->opts->print_number);
-        free_alglist(sols);
-}
-void
-scramble_exec(CommandArgs *args)
-{
-        Cube cube;
-        Alg *scr, *ruf, *aux;
-        int i, j, eo, ep, co, cp;
-        uint64_t ui, uj, uk;
-        srand(time(NULL));
-        for (i = 0; i < args->n; i++) {
-                if (!strcmp(args->scrtype, "dr")) {
-                        ui = rand() % FACTORIAL8;
-                        uj = rand() % FACTORIAL8;
-                        uk = rand() % FACTORIAL4;
-                        make_solved(&cube);
-                        index_to_perm(ui, 8, cube.cp);
-                        index_to_perm(uj, 8, cube.ep);
-                        index_to_perm(uk, 4, cube.ep + 8);
-                        for (j = 8; j < 12; j++)
-                                cube.ep[j] += 8;
-                } else if (!strcmp(args->scrtype, "htr")) {
-                        make_solved(&cube);
-                        /* TODO */
-                } else {
-                        ep = rand() % FACTORIAL12;
-                        cp = rand() % FACTORIAL8;
-                        eo = rand() % POW2TO11;
-                        co = rand() % POW3TO7;
-                        if (!strcmp(args->scrtype, "eo")) {
-                                eo = 0;
-                        } else if (!strcmp(args->scrtype, "corners")) {
-                                eo = 0;
-                                ep = 0;
-                        } else if (!strcmp(args->scrtype, "edges")) {
-                                co = 0;
-                                cp = 0;
-                        }
-                        make_solved(&cube);
-                        index_to_perm(ep, 12, cube.ep);
-                        index_to_perm(cp,  8, cube.cp);
-                        int_to_sum_zero_array(eo, 2, 12, cube.eo);
-                        int_to_sum_zero_array(co, 3,  8, cube.co);
-                }
-                if (!is_admissible(&cube)) {
-                        if (!strcmp(args->scrtype, "corners"))
-                                swap(&cube.cp[UFR], &cube.cp[UFL]);
-                        else
-                                swap(&cube.ep[UF], &cube.ep[UB]);
-                }
-                /* TODO: can be optimized for htr and dr using htrfin, drfin */
-                /*
-                TODO: solve_2phase was removed
-                scr = solve_2phase(&cube, 1);
-                */
-                if (!strcmp(args->scrtype, "fmc")) {
-                        aux = new_alg("");
-                        copy_alg(scr, aux);
-                        /* Trick to rufify for free: rotate the scramble  *
-                         * so that it does not start with F or end with R */
-                        for (j = 0; j < NROTATIONS; j++) {
-                                if (base_move(scr->move[0]) != F &&
-                                    base_move(scr->move[0]) != B &&
-                                    base_move(scr->move[scr->len-1]) != R &&
-                                    base_move(scr->move[scr->len-1]) != L)
-                                        break;
-                                copy_alg(aux, scr);
-                                transform_alg(j, scr);
-                        }
-                        copy_alg(scr, aux);
-                        ruf = new_alg("R' U' F");
-                        copy_alg(ruf, scr);
-                        compose_alg(scr, aux);
-                        compose_alg(scr, ruf);
-                        free_alg(aux);
-                        free_alg(ruf);
-                }
-                print_alg(scr, false);
-                free_alg(scr);
-        }
-}
-void
-gen_exec(CommandArgs *args)
-{
-/* TODO:
-        int i;
-        fprintf(stderr, "Generating coordinates...\n");
-        fprintf(stderr, "Generating pruning tables...\n");
-        for (i = 0; all_pd[i] != NULL; i++)
-                genptable(all_pd[i], args->opts->nthreads);
-*/
-        fprintf(stderr, "Done!\n");
-}
-void
-invert_exec(CommandArgs *args)
-{
-        Alg *inv;
-        inv = inverse_alg(args->scramble);
-        print_alg(inv, false);
-        free_alg(inv);
-}
-void
-steps_exec(CommandArgs *args)
-{
-        int i;
-        for (i = 0; csteps[i] != NULL; i++)
-                printf("%-15s %s\n", csteps[i]->shortname, csteps[i]->name);
-}
-void
-commands_exec(CommandArgs *args)
-{
-        int i;
-        for (i = 0; commands[i] != NULL; i++)
-                printf("%s\n", commands[i]->usage);
-}
-void
-freemem_exec(CommandArgs *args)
-{
-/* TODO:
-        int i;
-        for (i = 0; all_pd[i] != NULL; i++)
-                free_pd(all_pd[i]);
-        for (i = 0; all_sd[i] != NULL; i++)
-                free_sd(all_sd[i]);
-*/
-}
-void
-print_exec(CommandArgs *args)
-{
-        Cube c;
-        make_solved(&c);
-        apply_alg(args->scramble, &c);
-        print_cube(&c);
-}
-/*
-void
-twophase_exec(CommandArgs *args)
-{
-        Cube c;
-        Alg *sol;
-        make_solved(&c);
-        apply_alg(args->scramble, &c);
-        sol = solve_2phase(&c, 1);
-        print_alg(sol, false);
-        free_alg(sol);
-}
-*/
-void
-help_exec(CommandArgs *args)
-{
-        if (args->command == NULL) {
-                printf(
-                       "Use the nissy command \"help COMMAND\" for a short "
-                       "description of a specific command.\n"
-                       "Use the nissy command \"commands\" for a list of "
-                       "available commands.\n"
-                       "See the manual page for more details. The manual"
-                       " page is available with \"man nissy\" on a UNIX"
-                       " system (such as Linux or MacOS) or in pdf and html"
-                       " format in the docs folder.\n"
-                       "Nissy is available for free at "
-                       "https://nissy.tronto.net\n"
-                      );
-        } else {
-                printf("Command %s: %s\nusage: %s\n", args->command->name,
-                       args->command->description, args->command->usage);
-        }
-}
-void
-quit_exec(CommandArgs *args)
-{
-        exit(0);
-}
-void
-cleanup_exec(CommandArgs *args)
-{
-        Alg *alg;
-        alg = cleanup(args->scramble);
-        print_alg(alg, false);
-        free_alg(alg);
-}
-void
-unniss_exec(CommandArgs *args)
-{
-        Alg *aux;
-        aux = unniss(args->scramble);
-        print_alg(aux, false);
-        free(aux);
-}
-void
-version_exec(CommandArgs *args)
-{
-        printf(VERSION"\n");
-}
-/* Local functions implementation ********************************************/
-static bool
-read_scramble(int c, char **v, CommandArgs *args)
-{
-        int i, k, n;
-        unsigned int j;
-        char *algstr;
-        if (c < 1) {
-                fprintf(stderr, "Error: no scramble given?\n");
-                return false;
-        }
-        for(n = 0, i = 0; i < c; i++)
-                n += strlen(v[i]);
-        algstr = malloc((n + 1) * sizeof(char));
-        k = 0;
-        for (i = 0; i < c; i++)
-                for (j = 0; j < strlen(v[i]); j++)
-                        algstr[k++] = v[i][j];
-        algstr[k] = 0;
-        args->scramble = new_alg(algstr);
-        free(algstr);
-        if (args->scramble->len == 0)
-                fprintf(stderr, "Error reading scramble\n");
-        return args->scramble->len > 0;
-}
-static bool
-read_scrtype(CommandArgs *args, char *str)
-{
-        int i;
-        static char *scrtypes[20] =
-            { "eo", "corners", "edges", "fmc", "dr", "htr", NULL };
-        for (i = 0; scrtypes[i] != NULL; i++) {
-                if (!strcmp(scrtypes[i], str)) {
-                        strcpy(args->scrtype, scrtypes[i]);
-                        return true;
-                }
-        }
-        return false;
-}
-static bool
-read_cs(CommandArgs *args, char *str)
-{
-        int i;
-        for (i = 0; csteps[i] != NULL; i++) {
-                if (!strcmp(csteps[i]->shortname, str)) {
-                        args->cs = csteps[i];
-                        return true;
-                }
-        }
-        return false;
-}
-/* Public functions implementation *******************************************/
-void
-free_args(CommandArgs *args)
-{
-        if (args == NULL)
-                return;
-        if (args->scramble != NULL)
-                free_alg(args->scramble);
-        if (args->opts != NULL)
-                free(args->opts);
-        /* step and command must not be freed, they are static! */
-        free(args);
-}
-CommandArgs *
-new_args()
-{
-        CommandArgs *args = malloc(sizeof(CommandArgs));
-        args->success = false;
-        args->scrstdin = false;
-        args->scramble = NULL; /* initialized in read_scramble */
-        args->opts = malloc(sizeof(SolveOptions));
-        /* step and command are static */
-        args->cs = csteps[0]; /* default: first step in list */
-        args->command = NULL;
-        return args;
-}
diff --git a/src/commands.h b/src/commands.h
deleted file mode 100644
index 65708e0..0000000
--- a/src/commands.h
+++ /dev/null
@@ -1,211 +0,0 @@
-#ifndef COMMANDS_H
-#define COMMANDS_H
-#include <time.h>
-#include "solve.h"
-#include "steps.h"
-#include "solver_step.h"
-#include "threader_single.h"
-#include "threader_eager.h"
-void                    free_args(CommandArgs *args);
-CommandArgs *           new_args();
-/* Arg parsing functions *****************************************************/
-CommandArgs *           gen_parse_args(int c, char **v);
-CommandArgs *           help_parse_args(int c, char **v);
-CommandArgs *           parse_only_scramble(int c, char **v);
-CommandArgs *           parse_no_arg(int c, char **v);
-CommandArgs *           solve_parse_args(int c, char **v);
-CommandArgs *           scramble_parse_args(int c, char **v);
-/* Exec functions ************************************************************/
-void                    gen_exec(CommandArgs *args);
-void                    cleanup_exec(CommandArgs *args);
-void                    invert_exec(CommandArgs *args);
-void                    solve_exec(CommandArgs *args);
-void                    scramble_exec(CommandArgs *args);
-void                    steps_exec(CommandArgs *args);
-void                    commands_exec(CommandArgs *args);
-void                    freemem_exec(CommandArgs *args);
-void                    print_exec(CommandArgs *args);
-/*void                    twophase_exec(CommandArgs *args);*/
-void                    help_exec(CommandArgs *args);
-void                    quit_exec(CommandArgs *args);
-void                    unniss_exec(CommandArgs *args);
-void                    version_exec(CommandArgs *args);
-/* Commands ******************************************************************/
-#ifndef COMMANDS_C
-extern Command cleanup_cmd;
-extern Command commands_cmd;
-extern Command freemem_cmd;
-extern Command gen_cmd;
-extern Command help_cmd;
-extern Command invert_cmd;
-extern Command print_cmd;
-extern Command quit_cmd;
-extern Command scramble_cmd;
-extern Command solve_cmd;
-extern Command steps_cmd;
-extern Command unniss_cmd;
-extern Command version_cmd;
-extern Command *commands[];
-#else
-Command
-solve_cmd = {
-        .name        = "solve",
-        .usage       = "solve STEP [OPTIONS] SCRAMBLE",
-        .description = "Solve a step; see command steps for a list of steps",
-        .parse_args  = solve_parse_args,
-        .exec        = solve_exec
-};
-Command
-scramble_cmd = {
-        .name        = "scramble",
-        .usage       = "scramble [TYPE] [-n N]",
-        .description = "Get a random-position scramble",
-        .parse_args  = scramble_parse_args,
-        .exec        = scramble_exec,
-};
-Command
-gen_cmd = {
-        .name        = "gen",
-        .usage       = "gen [-t N]",
-        .description = "Generate all tables [using N threads]",
-        .parse_args  = gen_parse_args,
-        .exec        = gen_exec
-};
-Command
-invert_cmd = {
-        .name        = "invert",
-        .usage       = "invert SCRAMBLE]",
-        .description = "Invert a scramble",
-        .parse_args  = parse_only_scramble,
-        .exec        = invert_exec,
-};
-Command
-steps_cmd = {
-        .name        = "steps",
-        .usage       = "steps",
-        .description = "List available steps",
-        .parse_args  = parse_no_arg,
-        .exec        = steps_exec
-};
-Command
-commands_cmd = {
-        .name        = "commands",
-        .usage       = "commands",
-        .description = "List available commands",
-        .parse_args  = parse_no_arg,
-        .exec        = commands_exec
-};
-Command
-freemem_cmd = {
-        .name        = "freemem",
-        .usage       = "freemem",
-        .description = "free large tables from RAM",
-        .parse_args  = parse_no_arg,
-        .exec        = freemem_exec,
-};
-Command
-print_cmd = {
-        .name        = "print",
-        .usage       = "print SCRAMBLE",
-        .description = "Print written description of the cube",
-        .parse_args  = parse_only_scramble,
-        .exec        = print_exec,
-};
-Command
-help_cmd = {
-        .name        = "help",
-        .usage       = "help [COMMAND]",
-        .description = "Display nissy manual page or help on specific command",
-        .parse_args  = help_parse_args,
-        .exec        = help_exec,
-};
-/*
-Command
-twophase_cmd = {
-        .name        = "twophase",
-        .usage       = "twophase",
-        .description = "Find a solution quickly using a 2-phase method",
-        .parse_args  = parse_only_scramble,
-        .exec        = twophase_exec,
-};
-*/
-Command
-quit_cmd = {
-        .name        = "quit",
-        .usage       = "quit",
-        .description = "Quit nissy",
-        .parse_args  = parse_no_arg,
-        .exec        = quit_exec,
-};
-Command
-cleanup_cmd = {
-        .name        = "cleanup",
-        .usage       = "cleanup SCRAMBLE",
-        .description = "Rewrite a scramble using only standard moves (HTM)",
-        .parse_args  = parse_only_scramble,
-        .exec        = cleanup_exec,
-};
-Command
-unniss_cmd = {
-        .name        = "unniss",
-        .usage       = "unniss SCRAMBLE",
-        .description = "Rewrite a scramble without NISS",
-        .parse_args  = parse_only_scramble,
-        .exec        = unniss_exec,
-};
-Command
-version_cmd = {
-        .name        = "version",
-        .usage       = "version",
-        .description = "print nissy version",
-        .parse_args  = parse_no_arg,
-        .exec        = version_exec,
-};
-Command *commands[] = {
-        &commands_cmd,
-        &freemem_cmd,
-        &gen_cmd,
-        &help_cmd,
-        &invert_cmd,
-        &print_cmd,
-        &quit_cmd,
-        &solve_cmd,
-        &scramble_cmd,
-        &steps_cmd,
-/*      &twophase_cmd,*/
-        &cleanup_cmd,
-        &unniss_cmd,
-        &version_cmd,
-        NULL
-};
-#endif
-#endif
diff --git a/src/coord.c b/src/coord.c
deleted file mode 100644
index 673434f..0000000
--- a/src/coord.c
+++ /dev/null
@@ -1,654 +0,0 @@
-#define COORD_C
-#include "coord.h"
-static void        gen_coord_comp(Coordinate *coord);
-static void        gen_coord_sym(Coordinate *coord);
-static bool        read_coord_mtable(Coordinate *coord);
-static bool        read_coord_sd(Coordinate *coord);
-static bool        read_coord_ttable(Coordinate *coord);
-static bool        write_coord_mtable(Coordinate *coord);
-static bool        write_coord_sd(Coordinate *coord);
-static bool        write_coord_ttable(Coordinate *coord);
-/* Indexers ******************************************************************/
-uint64_t
-index_eofb(Cube *cube)
-{
-        return (uint64_t)digit_array_to_int(cube->eo, 11, 2);
-}
-uint64_t
-index_coud(Cube *cube)
-{
-        return (uint64_t)digit_array_to_int(cube->co, 7, 3);
-}
-uint64_t
-index_cp(Cube *cube)
-{
-        return (uint64_t)perm_to_index(cube->cp, 8);
-}
-uint64_t
-index_cpudsep(Cube *cube)
-{
-        int i, c[8];
-        for (i = 0; i < 8; i++)
-                c[i] = cube->cp[i] < 4 ? 0 : 1;
-        return (uint64_t)subset_to_index(c, 8, 4);
-}
-uint64_t
-index_epe(Cube *cube)
-{
-        int i, e[4];
-        for (i = 0; i < 4; i++)
-                e[i] = cube->ep[i+8] - 8;
-        return (uint64_t)perm_to_index(e, 4);
-}
-uint64_t
-index_epud(Cube *cube)
-{
-        return (uint64_t)perm_to_index(cube->ep, 8);
-}
-uint64_t
-index_epos(Cube *cube)
-{
-        int i, a[12];
-        for (i = 0; i < 12; i++)
-                a[i] = (cube->ep[i] < 8) ? 0 : 1;
-        return (uint64_t)subset_to_index(a, 12, 4);
-}
-uint64_t
-index_eposepe(Cube *cube)
-{
-        int i, j, e[4];
-        uint64_t epos, epe;
-        epos = (uint64_t)index_epos(cube);
-        for (i = 0, j = 0; i < 12; i++)
-                if (cube->ep[i] >= 8)
-                        e[j++] = cube->ep[i] - 8;
-        epe = (uint64_t)perm_to_index(e, 4);
-        return epos * FACTORIAL4 + epe;
-}
-/* Inverse indexers **********************************************************/
-void
-invindex_eofb(uint64_t ind, Cube *cube)
-{
-        int_to_sum_zero_array(ind, 2, 12, cube->eo);
-}
-void
-invindex_coud(uint64_t ind, Cube *cube)
-{
-        int_to_sum_zero_array(ind, 3, 8, cube->co);
-}
-void
-invindex_cp(uint64_t ind, Cube *cube)
-{
-        index_to_perm(ind, 8, cube->cp);
-}
-void
-invindex_cpudsep(uint64_t ind, Cube *cube)
-{
-        int i, j, k, c[8];
-        index_to_subset(ind, 8, 4, c);
-        for (i = 0, j = 0, k = 4; i < 8; i++)
-                cube->cp[i] = c[i] == 0 ? j++ : k++;
-}
-void
-invindex_epe(uint64_t ind, Cube *cube)
-{
-        int i;
-        index_to_perm(ind, 4, &cube->ep[8]);
-        for (i = 0; i < 4; i++)
-                cube->ep[i+8] += 8;
-}
-void
-invindex_epud(uint64_t ind, Cube *cube)
-{
-        index_to_perm(ind, 8, cube->ep);
-}
-void
-invindex_epos(uint64_t ind, Cube *cube)
-{
-        int i, j, k;
-        index_to_subset(ind, 12, 4, cube->ep);
-        for (i = 0, j = 0, k = 8; i < 12; i++)
-                if (cube->ep[i] == 0)
-                        cube->ep[i] = j++;
-                else
-                        cube->ep[i] = k++;
-}
-void
-invindex_eposepe(uint64_t ind, Cube *cube)
-{
-        int i, j, k, e[4];
-        uint64_t epos, epe;
-        epos = ind / FACTORIAL4;
-        epe = ind % FACTORIAL4;
-        index_to_subset(epos, 12, 4, cube->ep);
-        index_to_perm(epe, 4, e);
-        for (i = 0, j = 0, k = 0; i < 12; i++)
-                if (cube->ep[i] == 0)
-                        cube->ep[i] = j++;
-                else
-                        cube->ep[i] = e[k++] + 8;
-}
-/* Other local functions *****************************************************/
-uint64_t
-indexers_getmax(Indexer **is)
-{
-        int i;
-        uint64_t max = 1;
-        for (i = 0; is[i] != NULL; i++)
-                max *= is[i]->n;
-        return max;
-}
-uint64_t
-indexers_getind(Indexer **is, Cube *c)
-{
-        int i;
-        uint64_t max = 0;
-        for (i = 0; is[i] != NULL; i++) {
-                max *= is[i]->n;
-                max += is[i]->index(c);
-        }
-        return max;
-}
-void
-indexers_makecube(Indexer **is, uint64_t ind, Cube *c)
-{
-        /* Warning: anti-indexers are applied in the same order as indexers. */
-        /* We assume order does not matter, but it would make more sense to  */
-        /* apply them in reverse.                                            */
-        int i;
-        uint64_t m;
-        make_solved(c);
-        m = indexers_getmax(is);
-        for (i = 0; is[i] != NULL; i++) {
-                m /= is[i]->n;
-                is[i]->to_cube(ind / m, c);
-                ind %= m;
-        }
-}
-static void
-gen_coord_comp(Coordinate *coord)
-{
-        uint64_t ui;
-        Cube c, mvd;
-        Move m;
-        Trans t;
-        coord->max = indexers_getmax(coord->i);
-        for (m = 0; m < NMOVES; m++)
-                coord->mtable[m] = malloc(coord->max * sizeof(uint64_t));
-        for (t = 0; t < NTRANS; t++)
-                coord->ttable[t] = malloc(coord->max * sizeof(uint64_t));
-        if (!read_coord_mtable(coord)) {
-                fprintf(stderr, "%s: generating mtable\n", coord->name);
-                for (ui = 0; ui < coord->max; ui++) {
-                        indexers_makecube(coord->i, ui, &c);
-                        for (m = 0; m < NMOVES; m++) {
-                                copy_cube(&c, &mvd);
-                                apply_move(m, &mvd);
-                                coord->mtable[m][ui] =
-                                    indexers_getind(coord->i, &mvd);
-                        }
-                }
-                if (!write_coord_mtable(coord))
-                        fprintf(stderr, "%s: error writing mtable\n",
-                            coord->name);
-                
-                fprintf(stderr, "%s: mtable generated\n", coord->name);
-        }
-        if (!read_coord_ttable(coord)) {
-                fprintf(stderr, "%s: generating ttable\n", coord->name);
-                for (ui = 0; ui < coord->max; ui++) {
-                        indexers_makecube(coord->i, ui, &c);
-                        for (t = 0; t < NTRANS; t++) {
-                                copy_cube(&c, &mvd);
-                                apply_trans(t, &mvd);
-                                coord->ttable[t][ui] =
-                                    indexers_getind(coord->i, &mvd);
-                        }
-                }
-                if (!write_coord_ttable(coord))
-                        fprintf(stderr, "%s: error writing ttable\n",
-                            coord->name);
-        }
-}
-static void
-gen_coord_sym(Coordinate *coord)
-{
-        uint64_t i, in, ui, uj, uu, M, nr;
-        int j;
-        Move m;
-        Trans t;
-        M = coord->base[0]->max;
-        coord->selfsim    = malloc(M * sizeof(uint64_t));
-        coord->symclass   = malloc(M * sizeof(uint64_t));
-        coord->symrep     = malloc(M * sizeof(uint64_t));
-        coord->transtorep = malloc(M * sizeof(Trans));
-        if (!read_coord_sd(coord)) {
-                fprintf(stderr, "%s: generating syms\n", coord->name);
-                for (i = 0; i < M; i++)
-                        coord->symclass[i] = M+1;
-                for (i = 0, nr = 0; i < M; i++) {
-                        if (coord->symclass[i] != M+1)
-                                continue;
-                        coord->symrep[nr]    = i;
-                        coord->transtorep[i] = uf;
-                        coord->selfsim[nr]   = (uint64_t)0;
-                        for (j = 0; j < coord->tgrp->n; j++) {
-                                t = coord->tgrp->t[j];
-                                in = trans_coord(coord->base[0], t, i);
-                                coord->symclass[in] = nr;
-                                if (in == i)
-                                        coord->selfsim[nr] |= ((uint64_t)1<<t);
-                                else
-                                        coord->transtorep[in] =
-                                            inverse_trans(t);
-                        }
-                        nr++;
-                }
-                coord->max = nr;
-                fprintf(stderr, "%s: found %" PRIu64 " classes\n",
-                    coord->name, nr);
-                if (!write_coord_sd(coord))
-                        fprintf(stderr, "%s: error writing symdata\n",
-                            coord->name);
-        }
-        coord->symrep = realloc(coord->symrep, coord->max*sizeof(uint64_t));
-        coord->selfsim = realloc(coord->selfsim, coord->max*sizeof(uint64_t));
-        for (m = 0; m < NMOVES; m++) {
-                coord->mtable[m] = malloc(coord->max*sizeof(uint64_t));
-                coord->ttrep_move[m] = malloc(coord->max*sizeof(Trans));
-        }
-        if (!read_coord_mtable(coord)) {
-                for (ui = 0; ui < coord->max; ui++) {
-                        uu = coord->symrep[ui];
-                        for (m = 0; m < NMOVES; m++) {
-                                uj = move_coord(coord->base[0], m, uu, NULL);
-                                coord->mtable[m][ui] = coord->symclass[uj];
-                                coord->ttrep_move[m][ui] =
-                                    coord->transtorep[uj];
-                        }
-                }
-                if (!write_coord_mtable(coord))
-                        fprintf(stderr, "%s: error writing mtable\n",
-                            coord->name);
-        }
-}
-static bool
-read_coord_mtable(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        Move m;
-        uint64_t M;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/mt_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "rb")) == NULL)
-                return false;
-        M = coord->max;
-        r = true;
-        for (m = 0; m < NMOVES; m++)
-                r = r && fread(coord->mtable[m], sizeof(uint64_t), M, f) == M;
-        if (coord->type == SYM_COORD)
-                for (m = 0; m < NMOVES; m++)
-                        r = r && fread(coord->ttrep_move[m],
-                            sizeof(Trans), M, f) == M;
-        fclose(f);
-        return r;
-}
-static bool
-read_coord_sd(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        uint64_t M, N;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/sd_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "rb")) == NULL)
-                return false;
-        r = true;
-        r = r && fread(&coord->max,       sizeof(uint64_t), 1, f) == 1;
-        M = coord->max;
-        N = coord->base[0]->max;
-        r = r && fread(coord->symrep,     sizeof(uint64_t), M, f) == M;
-        r = r && fread(coord->selfsim,    sizeof(uint64_t), M, f) == M;
-        r = r && fread(coord->symclass,   sizeof(uint64_t), N, f) == N;
-        r = r && fread(coord->transtorep, sizeof(Trans),    N, f) == N;
-        fclose(f);
-        return r;
-}
-static bool
-read_coord_ttable(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        Trans t;
-        uint64_t M;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/tt_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "rb")) == NULL)
-                return false;
-        M = coord->max;
-        r = true;
-        for (t = 0; t < NTRANS; t++)
-                r = r && fread(coord->ttable[t], sizeof(uint64_t), M, f) == M;
-        fclose(f);
-        return r;
-}
-static bool
-write_coord_mtable(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        Move m;
-        uint64_t M;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/mt_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "wb")) == NULL)
-                return false;
-        M = coord->max;
-        r = true;
-        for (m = 0; m < NMOVES; m++)
-                r = r && fwrite(coord->mtable[m], sizeof(uint64_t), M, f) == M;
-        if (coord->type == SYM_COORD)
-                for (m = 0; m < NMOVES; m++)
-                        r = r && fwrite(coord->ttrep_move[m],
-                            sizeof(Trans), M, f) == M;
-        fclose(f);
-        return r;
-}
-static bool
-write_coord_sd(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        uint64_t M, N;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/sd_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "wb")) == NULL)
-                return false;
-        r = true;
-        M = coord->max;
-        N = coord->base[0]->max;
-        r = r && fwrite(&coord->max,       sizeof(uint64_t), 1, f) == 1;
-        r = r && fwrite(coord->symrep,     sizeof(uint64_t), M, f) == M;
-        r = r && fwrite(coord->selfsim,    sizeof(uint64_t), M, f) == M;
-        r = r && fwrite(coord->symclass,   sizeof(uint64_t), N, f) == N;
-        r = r && fwrite(coord->transtorep, sizeof(Trans),    N, f) == N;
-        fclose(f);
-        return r;
-}
-static bool
-write_coord_ttable(Coordinate *coord)
-{
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        Trans t;
-        uint64_t M;
-        bool r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/tt_");
-        strcat(fname, coord->name);
-        if ((f = fopen(fname, "wb")) == NULL)
-                return false;
-        M = coord->max;
-        r = true;
-        for (t = 0; t < NTRANS; t++)
-                r = r && fwrite(coord->ttable[t], sizeof(uint64_t), M, f) == M;
-        fclose(f);
-        return r;
-}
-/* Public functions **********************************************************/
-void
-gen_coord(Coordinate *coord)
-{
-        int i;
-        if (coord == NULL || coord->generated)
-                return;
-        for (i = 0; i < 2; i++)
-                gen_coord(coord->base[i]);
-        switch (coord->type) {
-        case COMP_COORD:
-                if (coord->i[0] == NULL)
-                        goto error_gc;
-                gen_coord_comp(coord);
-                break;
-        case SYM_COORD:
-                if (coord->base[0] == NULL || coord->tgrp == NULL)
-                        goto error_gc;
-                gen_coord_sym(coord);
-                break;
-        case SYMCOMP_COORD:
-                if (coord->base[0] == NULL || coord->base[1] == NULL)
-                        goto error_gc;
-                coord->max = coord->base[0]->max * coord->base[1]->max;
-                break;
-        default:
-                break;
-        }
-        coord->generated = true;
-        return;
-error_gc:
-        fprintf(stderr, "Error generating coordinates.\n"
-                        "This is a bug, pleae report.\n");
-        exit(1);
-}
-uint64_t
-index_coord(Coordinate *coord, Cube *cube, Trans *offtrans)
-{
-        uint64_t c[2], cnosym;
-        Trans ttr;
-        switch (coord->type) {
-        case COMP_COORD:
-                if (offtrans != NULL)
-                        *offtrans = uf;
-                return indexers_getind(coord->i, cube);
-        case SYM_COORD:
-                cnosym = index_coord(coord->base[0], cube, NULL);
-                ttr = coord->transtorep[cnosym];
-                if (offtrans != NULL)
-                        *offtrans = ttr;
-                return coord->symclass[cnosym];
-        case SYMCOMP_COORD:
-                c[0] = index_coord(coord->base[0], cube, NULL);
-                cnosym = index_coord(coord->base[0]->base[0], cube, NULL);
-                ttr = coord->base[0]->transtorep[cnosym];
-                c[1] = index_coord(coord->base[1], cube, NULL);
-                c[1] = trans_coord(coord->base[1], ttr, c[1]);
-                if (offtrans != NULL)
-                        *offtrans = ttr;
-                return c[0] * coord->base[1]->max + c[1];
-        default:
-                break;
-        }
-        return coord->max; /* Only reached in case of error */
-}
-uint64_t
-move_coord(Coordinate *coord, Move m, uint64_t ind, Trans *offtrans)
-{
-        uint64_t i[2], M;
-        Trans ttr;
-        /* Some safety checks should be done here, but for performance   *
-         * reasons we'd rather do them before calling this function.     *
-         * We should check if coord is generated.                        */
-        switch (coord->type) {
-        case COMP_COORD:
-                if (offtrans != NULL)
-                        *offtrans = uf;
-                return coord->mtable[m][ind];
-        case SYM_COORD:
-                ttr = coord->ttrep_move[m][ind];
-                if (offtrans != NULL)
-                        *offtrans = ttr;
-                return coord->mtable[m][ind];
-        case SYMCOMP_COORD:
-                M = coord->base[1]->max;
-                i[0] = ind / M;
-                i[1] = ind % M;
-                ttr = coord->base[0]->ttrep_move[m][i[0]];
-                i[0] = coord->base[0]->mtable[m][i[0]];
-                i[1] = coord->base[1]->mtable[m][i[1]];
-                i[1] = coord->base[1]->ttable[ttr][i[1]];
-                if (offtrans != NULL)
-                        *offtrans = ttr;
-                return i[0] * M + i[1];
-        default:
-                break;
-        }
-        return coord->max; /* Only reached in case of error */
-}
-uint64_t
-trans_coord(Coordinate *coord, Trans t, uint64_t ind)
-{
-        uint64_t i[2], M;
-        /* Some safety checks should be done here, but for performance   *
-         * reasons we'd rather do them before calling this function.     *
-         * We should check if coord is generated.                        */
-        switch (coord->type) {
-        case COMP_COORD:
-                return coord->ttable[t][ind];
-        case SYM_COORD:
-                return ind;
-        case SYMCOMP_COORD:
-                M = coord->base[1]->max;
-                i[0] = ind / M; /* Always fixed */
-                i[1] = ind % M;
-                i[1] = coord->base[1]->ttable[t][i[1]];
-                return i[0] * M + i[1];
-        default:
-                break;
-        }
-        return coord->max; /* Only reached in case of error */
-}
diff --git a/src/coord.h b/src/coord.h
deleted file mode 100644
index 4cd7e47..0000000
--- a/src/coord.h
+++ /dev/null
@@ -1,259 +0,0 @@
-#ifndef COORD_H
-#define COORD_H
-#include "trans.h"
-void                    gen_coord(Coordinate *coord);
-uint64_t                index_coord(Coordinate *coord, Cube *cube,
-                            Trans *offtrans);
-uint64_t                indexers_getind(Indexer **is, Cube *c);
-void                    indexers_makecube(Indexer **is, uint64_t ind, Cube *c);
-uint64_t                move_coord(Coordinate *coord, Move m,
-                            uint64_t ind, Trans *offtrans);
-uint64_t                trans_coord(Coordinate *coord, Trans t, uint64_t ind);
-/* Base coordinates and their index functions ********************************/
-#ifndef COORD_C
-extern Coordinate coord_eofb;
-extern Coordinate coord_coud;
-extern Coordinate coord_cp;
-extern Coordinate coord_cpudsep;
-extern Coordinate coord_epos;
-extern Coordinate coord_epe;
-extern Coordinate coord_eposepe;
-extern Coordinate coord_epud;
-extern Coordinate coord_eofbepos;
-extern Coordinate coord_coud_cpudsep;
-extern Coordinate coord_eofbepos_sym16;
-extern Coordinate coord_cp_sym16;
-extern Coordinate coord_corners_sym16;
-extern Coordinate coord_drud_sym16;
-extern Coordinate coord_drudfin_noE_sym16;
-extern Coordinate coord_nxopt31;
-extern Coordinate *all_coordinates[];
-#else
-/* Indexers ******************************************************************/
-uint64_t index_eofb(Cube *cube);
-void     invindex_eofb(uint64_t ind, Cube *ret);
-Indexer
-i_eofb = {
-        .n       = POW2TO11,
-        .index   = index_eofb,
-        .to_cube = invindex_eofb,
-};
-uint64_t index_coud(Cube *cube);
-void     invindex_coud(uint64_t ind, Cube *ret);
-Indexer
-i_coud = {
-        .n       = POW3TO7,
-        .index   = index_coud,
-        .to_cube = invindex_coud,
-};
-uint64_t index_cp(Cube *cube);
-void     invindex_cp(uint64_t ind, Cube *ret);
-Indexer
-i_cp = {
-        .n       = FACTORIAL8,
-        .index   = index_cp,
-        .to_cube = invindex_cp,
-};
-uint64_t index_cpudsep(Cube *cube);
-void     invindex_cpudsep(uint64_t ind, Cube *ret);
-Indexer
-i_cpudsep = {
-        .n       = BINOM8ON4,
-        .index   = index_cpudsep,
-        .to_cube = invindex_cpudsep,
-};
-uint64_t index_epos(Cube *cube);
-void     invindex_epos(uint64_t ind, Cube *ret);
-Indexer
-i_epos = {
-        .n       = BINOM12ON4,
-        .index   = index_epos,
-        .to_cube = invindex_epos,
-};
-uint64_t index_epe(Cube *cube);
-void     invindex_epe(uint64_t ind, Cube *ret);
-Indexer
-i_epe = {
-        .n       = FACTORIAL4,
-        .index   = index_epe,
-        .to_cube = invindex_epe,
-};
-uint64_t index_eposepe(Cube *cube);
-void     invindex_eposepe(uint64_t ind, Cube *ret);
-Indexer
-i_eposepe = {
-        .n       = BINOM12ON4 * FACTORIAL4,
-        .index   = index_eposepe,
-        .to_cube = invindex_eposepe,
-};
-uint64_t index_epud(Cube *cube);
-void     invindex_epud(uint64_t ind, Cube *ret);
-Indexer
-i_epud = {
-        .n       = FACTORIAL8,
-        .index   = index_epud,
-        .to_cube = invindex_epud,
-};
-/* Composite coordinates *****************************************************/
-Coordinate
-coord_eofb = {
-        .name = "eofb",
-        .type = COMP_COORD,
-        .i    = {&i_eofb, NULL},
-};
-Coordinate
-coord_coud = {
-        .name = "coud",
-        .type = COMP_COORD,
-        .i    = {&i_coud, NULL},
-};
-Coordinate
-coord_cp = {
-        .name = "cp",
-        .type = COMP_COORD,
-        .i    = {&i_cp, NULL},
-};
-Coordinate
-coord_cpudsep = {
-        .name = "cpudsep",
-        .type = COMP_COORD,
-        .i    = {&i_cpudsep, NULL},
-};
-Coordinate
-coord_epos = {
-        .name = "epos",
-        .type = COMP_COORD,
-        .i    = {&i_epos, NULL},
-};
-Coordinate
-coord_epe = {
-        .name = "epe",
-        .type = COMP_COORD,
-        .i    = {&i_epe, NULL},
-};
-Coordinate
-coord_eposepe = { /* Has to be done by hand, hard compose epos + epe */
-        .name = "eposepe",
-        .type = COMP_COORD,
-        .i    = {&i_eposepe, NULL},
-};
-Coordinate
-coord_epud = {
-        .name = "epud",
-        .type = COMP_COORD,
-        .i    = {&i_epud, NULL},
-};
-Coordinate
-coord_eofbepos = {
-        .name = "eofbepos",
-        .type = COMP_COORD,
-        .i    = {&i_epos, &i_eofb, NULL},
-};
-Coordinate
-coord_coud_cpudsep = {
-        .name = "coud_cpudsep",
-        .type = COMP_COORD,
-        .i    = {&i_coud, &i_cpudsep, NULL},
-};
-/* Symcoordinates ************************************************************/
-Coordinate
-coord_eofbepos_sym16 = {
-        .name = "eofbepos_sym16",
-        .type = SYM_COORD,
-        .base = {&coord_eofbepos, NULL},
-        .tgrp = &tgrp_udfix,
-};
-Coordinate
-coord_cp_sym16 = {
-        .name = "cp_sym16",
-        .type = SYM_COORD,
-        .base = {&coord_cp, NULL},
-        .tgrp = &tgrp_udfix,
-};
-/* "Symcomp" coordinates *****************************************************/
-Coordinate
-coord_corners_sym16 = {
-        .name = "corners_sym16",
-        .type = SYMCOMP_COORD,
-        .base = {&coord_cp_sym16, &coord_coud},
-};
-Coordinate
-coord_drud_sym16 = {
-        .name = "drud_sym16",
-        .type = SYMCOMP_COORD,
-        .base = {&coord_eofbepos_sym16, &coord_coud},
-};
-Coordinate
-coord_drudfin_noE_sym16 = {
-        .name = "drudfin_noE_sym16",
-        .type = SYMCOMP_COORD,
-        .base = {&coord_cp_sym16, &coord_epud},
-};
-Coordinate
-coord_nxopt31 = {
-        .name = "nxopt31",
-        .type = SYMCOMP_COORD,
-        .base = {&coord_eofbepos_sym16, &coord_coud_cpudsep},
-};
-/* All coordinates ***********************************************************/
-Coordinate *all_coordinates[] = {
-        &coord_eofb,
-        &coord_coud,
-        &coord_cp,
-        &coord_cpudsep,
-        &coord_epos,
-        &coord_epe,
-        &coord_eposepe,
-        &coord_epud,
-        &coord_eofbepos,
-        &coord_coud_cpudsep,
-        &coord_eofbepos_sym16,
-        &coord_cp_sym16,
-        &coord_corners_sym16,
-        &coord_drud_sym16,
-        &coord_drudfin_noE_sym16,
-        &coord_nxopt31,
-        NULL
-};
-#endif
-#endif
diff --git a/src/cube.c b/src/cube.c
deleted file mode 100644
index 92c6713..0000000
--- a/src/cube.c
+++ /dev/null
@@ -1,270 +0,0 @@
-#define CUBE_C
-#include "cube.h"
-static int where_is_piece(int piece, int *arr, int n);
-void
-compose_centers(Cube *c2, Cube *c1)
-{
-        apply_permutation(c2->xp, c1->xp, 6);
-}
-void
-compose_corners(Cube *c2, Cube *c1)
-{
-        apply_permutation(c2->cp, c1->cp, 8);
-        apply_permutation(c2->cp, c1->co, 8);
-        sum_arrays_mod(c2->co, c1->co, 8, 3);
-}
-void
-compose_edges(Cube *c2, Cube *c1)
-{
-        apply_permutation(c2->ep, c1->ep, 12);
-        apply_permutation(c2->ep, c1->eo, 12);
-        sum_arrays_mod(c2->eo, c1->eo, 12, 2);
-}
-void
-compose(Cube *c2, Cube *c1)
-{
-        compose_centers(c2, c1);
-        compose_corners(c2, c1);
-        compose_edges(c2, c1);
-}
-void
-copy_cube_centers(Cube *src, Cube *dst)
-{
-        memcpy(dst->xp, src->xp,  6 * sizeof(int));
-}
-void
-copy_cube_corners(Cube *src, Cube *dst)
-{
-        memcpy(dst->cp, src->cp,  8 * sizeof(int));
-        memcpy(dst->co, src->co,  8 * sizeof(int));
-}
-void
-copy_cube_edges(Cube *src, Cube *dst)
-{
-        memcpy(dst->ep, src->ep, 12 * sizeof(int));
-        memcpy(dst->eo, src->eo, 12 * sizeof(int));
-}
-void
-copy_cube(Cube *src, Cube *dst)
-{
-        copy_cube_centers(src, dst);
-        copy_cube_corners(src, dst);
-        copy_cube_edges(src, dst);
-}
-bool
-equal(Cube *c1, Cube *c2)
-{
-        int i;
-        for (i = 0; i < 12; i++)
-                if (c1->ep[i] != c2->ep[i] || c1->eo[i] != c2->eo[i])
-                        return false;
-        for (i = 0; i < 8; i++)
-                if (c1->cp[i] != c2->cp[i] || c1->co[i] != c2->co[i])
-                        return false;
-        for (i = 0; i < 6; i++)
-                if (c1->xp[i] != c2->xp[i])
-                        return false;
-        return true;
-}
-void
-invert_cube_centers(Cube *cube)
-{
-        int i;
-        Cube aux;
-        copy_cube_centers(cube, &aux);
-        for (i = 0; i < 6; i++)
-                cube->xp[aux.xp[i]] = i;
-}
-void
-invert_cube_corners(Cube *cube)
-{
-        int i;
-        Cube aux;
-        copy_cube_corners(cube, &aux);
-        for (i = 0; i < 8; i++) {
-                cube->cp[aux.cp[i]] = i;
-                cube->co[aux.cp[i]] = (3 - aux.co[i]) % 3;
-        }
-}
-void
-invert_cube_edges(Cube *cube)
-{
-        int i;
-        Cube aux;
-        copy_cube_edges(cube, &aux);
-        for (i = 0; i < 12; i++) {
-                cube->ep[aux.ep[i]] = i;
-                cube->eo[aux.ep[i]] = aux.eo[i];
-        }
-}
-void
-invert_cube(Cube *cube)
-{
-        invert_cube_centers(cube);
-        invert_cube_corners(cube);
-        invert_cube_edges(cube);
-}
-bool
-is_admissible(Cube *c) {
-        bool perm;
-        int sign, i;
-        int sum_e, sum_c;
-        perm = is_perm(c->ep, 12) && is_perm(c->cp, 8) && is_perm(c->xp, 6);
-        sign = perm_sign(c->ep,12) + perm_sign(c->cp,8) + perm_sign(c->xp,6);
-        for (i = 0, sum_e = 0; i < 12; i++)
-                if (c->eo[i] > 1)
-                        return false;
-                else
-                        sum_e += c->eo[i];
-        for (i = 0, sum_c = 0; i < 8; i++)
-                if (c->co[i] > 2)
-                        return false;
-                else
-                        sum_c += c->co[i];
-        return (perm && sign % 2 == 0 && sum_e % 2 == 0 && sum_c % 2 == 0);
-}
-bool
-is_solved(Cube *cube)
-{
-        Cube solved_cube;
-        make_solved(&solved_cube);
-        return equal(cube, &solved_cube);
-}
-void
-make_solved_centers(Cube *cube)
-{
-        static int sorted[6] = {0, 1, 2, 3, 4, 5};
-        memcpy(cube->xp, sorted,  6 * sizeof(int));
-}
-void
-make_solved_corners(Cube *cube)
-{
-        static int sorted[8] = {0, 1, 2, 3, 4, 5, 6, 7};
-        memcpy(cube->cp, sorted,  8 * sizeof(int));
-        memset(cube->co, 0,       8 * sizeof(int));
-}
-void
-make_solved_edges(Cube *cube)
-{
-        static int sorted[12] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
-        memcpy(cube->ep, sorted, 12 * sizeof(int));
-        memset(cube->eo, 0,      12 * sizeof(int));
-}
-void
-make_solved(Cube *cube)
-{
-        make_solved_centers(cube);
-        make_solved_corners(cube);
-        make_solved_edges(cube);
-}
-void
-print_cube(Cube *cube)
-{
-        static char edge_string[12][7] = {
-                [UF] = "UF", [UL] = "UL", [UB] = "UB", [UR] = "UR",
-                [DF] = "DF", [DL] = "DL", [DB] = "DB", [DR] = "DR",
-                [FR] = "FR", [FL] = "FL", [BL] = "BL", [BR] = "BR"
-        };
-        static char corner_string[8][7] = {
-                [UFR] = "UFR", [UFL] = "UFL", [UBL] = "UBL", [UBR] = "UBR",
-                [DFR] = "DFR", [DFL] = "DFL", [DBL] = "DBL", [DBR] = "DBR"
-        };
-        static char center_string[6][7] = {
-                [U_center] = "U", [D_center] = "D",
-                [R_center] = "R", [L_center] = "L", 
-                [F_center] = "F", [B_center] = "B"
-        };
-        for (int i = 0; i < 12; i++)
-                printf(" %s ", edge_string[cube->ep[i]]);
-        printf("\n");
-        for (int i = 0; i < 12; i++)
-                printf("  %" PRIu8 " ", cube->eo[i]);
-        printf("\n");
-        for (int i = 0; i < 8; i++)
-                printf("%s ", corner_string[cube->cp[i]]);
-        printf("\n");
-        for (int i = 0; i < 8; i++)
-                printf("  %" PRIu8 " ", cube->co[i]);
-        printf("\n");
-        for (int i = 0; i < 6; i++)
-                printf("  %s ", center_string[cube->xp[i]]);
-        printf("\n");
-}
-int
-where_is_center(Center x, Cube *c)
-{
-        return where_is_piece(x, c->xp, 6);
-}
-int
-where_is_corner(Corner k, Cube *c)
-{
-        return where_is_piece(k, c->cp, 8);
-}
-int
-where_is_edge(Edge e, Cube *c)
-{
-        return where_is_piece(e, c->ep, 12);
-}
-static int
-where_is_piece(int piece, int *arr, int n)
-{
-        int i;
-        for (i = 0; i < n; i++)
-                if (arr[i] == piece)
-                        return i;
-        return -1;
-}
diff --git a/src/cube.h b/src/cube.h
deleted file mode 100644
index f182b27..0000000
--- a/src/cube.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#ifndef CUBE_H
-#define CUBE_H
-#include <stdio.h>
-#include "cubetypes.h"
-#include "env.h"
-#include "utils.h"
-void        compose(Cube *c2, Cube *c1); /* Use c2 as an alg on c1 */
-void        compose_centers(Cube *c2, Cube *c1);
-void        compose_corners(Cube *c2, Cube *c1);
-void        compose_edges(Cube *c2, Cube *c1);
-void        copy_cube(Cube *src, Cube *dst);
-void        copy_cube_centers(Cube *src, Cube *dst);
-void        copy_cube_corners(Cube *src, Cube *dst);
-void        copy_cube_edges(Cube *src, Cube *dst);
-bool        equal(Cube *c1, Cube *c2);
-void        invert_cube(Cube *cube);
-void        invert_cube_centers(Cube *cube);
-void        invert_cube_corners(Cube *cube);
-void        invert_cube_edges(Cube *cube);
-bool        is_admissible(Cube *cube);
-bool        is_solved(Cube *cube);
-void        make_solved(Cube *cube);
-void        make_solved_centers(Cube *cube);
-void        make_solved_corners(Cube *cube);
-void        make_solved_edges(Cube *cube);
-void        print_cube(Cube *cube);
-int         where_is_center(Center x, Cube *c);
-int         where_is_corner(Corner k, Cube *c);
-int         where_is_edge(Edge e, Cube *c);
-#endif
diff --git a/src/cubetypes.h b/src/cubetypes.h
deleted file mode 100644
index 3752019..0000000
--- a/src/cubetypes.h
+++ /dev/null
@@ -1,360 +0,0 @@
-#ifndef CUBETYPES_H
-#define CUBETYPES_H
-#include <stdbool.h>
-#include <inttypes.h>
-#include <pthread.h>
-#define NMOVES               55 /* Actually 54, but one is NULLMOVE */
-#define NTRANS               48
-#define NROTATIONS           24
-#define entry_group_t        uint8_t /* For pruning tables */
-#define MAX_N_COORD          6
-/* Enums *********************************************************************/
-typedef enum
-center
-{
-        U_center, D_center,
-        R_center, L_center,
-        F_center, B_center
-} Center;
-typedef enum
-corner
-{
-        UFR, UFL, UBL, UBR,
-        DFR, DFL, DBL, DBR
-} Corner;
-typedef enum
-coordtype
-{
-        COMP_COORD, SYM_COORD, SYMCOMP_COORD
-} CoordType;
-typedef enum
-edge
-{
-        UF, UL, UB, UR,
-        DF, DL, DB, DR,
-        FR, FL, BL, BR
-} Edge;
-typedef enum
-move
-{
-        NULLMOVE,
-        U, U2, U3, D, D2, D3,
-        R, R2, R3, L, L2, L3,
-        F, F2, F3, B, B2, B3,
-        Uw, Uw2, Uw3, Dw, Dw2, Dw3,
-        Rw, Rw2, Rw3, Lw, Lw2, Lw3,
-        Fw, Fw2, Fw3, Bw, Bw2, Bw3,
-        M, M2, M3,
-        S, S2, S3,
-        E, E2, E3,
-        x, x2, x3,
-        y, y2, y3,
-        z, z2, z3,
-} Move;
-typedef enum
-trans
-{
-        uf, ur, ub, ul,
-        df, dr, db, dl,
-        rf, rd, rb, ru,
-        lf, ld, lb, lu,
-        fu, fr, fd, fl,
-        bu, br, bd, bl,
-        uf_mirror, ur_mirror, ub_mirror, ul_mirror,
-        df_mirror, dr_mirror, db_mirror, dl_mirror,
-        rf_mirror, rd_mirror, rb_mirror, ru_mirror,
-        lf_mirror, ld_mirror, lb_mirror, lu_mirror,
-        fu_mirror, fr_mirror, fd_mirror, fl_mirror,
-        bu_mirror, br_mirror, bd_mirror, bl_mirror,
-} Trans;
-/* Typedefs ******************************************************************/
-typedef struct alg                Alg;
-typedef struct alglist            AlgList;
-typedef struct alglistnode        AlgListNode;
-typedef struct choicestep         ChoiceStep;
-typedef struct command            Command;
-typedef struct commandargs        CommandArgs;
-typedef struct coordinate         Coordinate;
-typedef struct cube               Cube;
-/*typedef struct dfsarg             DfsArg;*/
-typedef struct fstcube            FstCube;
-typedef struct indexer            Indexer;
-typedef struct movable            Movable;
-typedef struct moveset            Moveset;
-typedef struct prunedata          PruneData;
-typedef struct solveoptions       SolveOptions;
-typedef struct step               Step;
-typedef struct symdata            SymData;
-typedef struct threaddatasolve    ThreadDataSolve;
-typedef struct threaddatagenpt    ThreadDataGenpt;
-typedef struct transgroup         TransGroup;
-typedef bool                 (*Checker)          (Cube *);
-typedef bool                 (*CubeTester)       (Cube *, Alg *);
-/*typedef bool                 (*DfsMover)         (DfsArg *);*/
-typedef void                 (*DfsExtraCopier)   (void *, void *);
-typedef Alg *                (*Validator)        (Alg *);
-typedef void                 (*Exec)             (CommandArgs *);
-typedef CommandArgs *        (*ArgParser)        (int, char **);
-typedef bool                 (*Tester)           (void);
-typedef int                  (*TransFinder)      (uint64_t, Trans *);
-/* Structs *******************************************************************/
-struct
-alg
-{
-        Move *                    move;
-        bool *                    inv;
-        int                       len;
-        int                       allocated;
-        Move *                    move_normal;
-        int                       len_normal;
-        Move *                    move_inverse;
-        int                       len_inverse;
-};
-struct
-alglist
-{
-        AlgListNode *             first;
-        AlgListNode *             last;
-        int                       len;
-};
-struct
-alglistnode
-{
-        Alg *                     alg;
-        AlgListNode *             next;
-};
-struct
-choicestep
-{
-        char *                    shortname;
-        char *                    name;
-        Step *                    step[99];
-        Trans                     t[99];
-        char *                    ready_msg;
-};
-struct
-command
-{
-        char *                    name;
-        char *                    usage;
-        char *                    description;
-        ArgParser                 parse_args;
-        Exec                      exec;
-};
-struct
-commandargs
-{
-        bool                      success;
-        Alg *                     scramble;
-        SolveOptions *            opts;
-        ChoiceStep *              cs;
-        Command *                 command; /* For help */
-        int                       n;
-        char                      scrtype[20];
-        bool                      scrstdin;
-        bool                      header;
-};
-struct
-coordinate
-{
-        char *                    name;
-        CoordType                 type;
-        bool                      generated;
-        Indexer *                 i[99];
-        uint64_t                  max;
-        uint64_t *                mtable[NMOVES];
-        uint64_t *                ttable[NTRANS];
-        TransGroup *              tgrp;
-        Coordinate *              base[2];
-        uint64_t *                symclass;
-        uint64_t *                symrep;
-        Trans *                   transtorep;
-        Trans *                   ttrep_move[NMOVES];
-        uint64_t *                selfsim;
-};
-struct
-cube
-{
-        int                       ep[12];
-        int                       eo[12];
-        int                       cp[8];
-        int                       co[8];
-        int                       xp[6];
-};
-/*
-struct
-movable
-{
-        uint64_t                  val;
-        Trans                     t;
-};
-*/
-/*
-struct
-dfsarg
-{
-        Cube *                    cube;
-        Movable                   ind[MAX_N_COORD];
-        Trans                     t;
-        Step *                    s;
-        SolveOptions *            opts;
-        int                       d;
-        int                       bound;
-        bool                      niss;
-        AlgList *                 sols;
-        pthread_mutex_t *         sols_mutex;
-        Alg *                     current_alg;
-        void *                    extra;
-};
-*/
-/*
-struct
-dfsarg
-{
-        void *                    cube_data;
-        SolveOptions *            opts;
-        int                       d;
-        int                       bound;
-        bool                      niss;
-        AlgList *                 sols;
-        Alg *                     current_alg;
-        Solver *                  solver;
-        Threader *                threader;
-};
-*/
-struct
-fstcube
-{
-        uint16_t                  uf_eofb;
-        uint16_t                  uf_eposepe;
-        uint16_t                  uf_coud;
-        uint16_t                  uf_cp;
-        uint16_t                  fr_eofb;
-        uint16_t                  fr_eposepe;
-        uint16_t                  fr_coud;
-        uint16_t                  rd_eofb;
-        uint16_t                  rd_eposepe;
-        uint16_t                  rd_coud;
-};
-struct
-indexer
-{
-        int                       n;
-        uint64_t                  (*index)(Cube *);
-        void                      (*to_cube)(uint64_t, Cube *);
-};
-struct
-moveset
-{
-        char *                    name;
-        bool                      (*allowed)(Move);
-        bool                      (*can_append)(Alg *, Move, bool);
-        bool                      (*cancel_niss)(Alg *);
-        Move                      sorted_moves[NMOVES+1];
-};
-struct
-prunedata
-{
-        entry_group_t *           ptable;
-        uint64_t                  n;
-        Coordinate *              coord;
-        Moveset *                 moveset;
-        uint64_t                  count[16];
-        bool                      compact;
-        int                       base;
-};
-struct
-solveoptions
-{
-        int                       min_moves;
-        int                       max_moves;
-        int                       max_solutions;
-        int                       nthreads;
-        int                       optimal;
-        bool                      can_niss;
-        bool                      verbose;
-        bool                      all;
-        bool                      print_number;
-        bool                      count_only;
-};
-struct
-step
-{
-        Checker                   ready;
-        bool                      final;
-        Moveset *                 moveset;
-        int                       n_coord;
-        Coordinate *              coord[MAX_N_COORD];
-        Trans                     coord_trans[MAX_N_COORD];
-        PruneData *               pd[MAX_N_COORD];
-        bool                      pd_compact[MAX_N_COORD];
-        Validator                 is_valid;
-        /*DfsMover                  custom_move_checkstop;*/
-        DfsExtraCopier            copy_extra;
-};
-/*
-struct
-threaddatasolve
-{
-        DfsArg                    arg;
-        int                       thid;
-        AlgList *                 start;
-        AlgListNode **            node;
-        pthread_mutex_t *         start_mutex;
-};
-*/
-struct
-threaddatagenpt
-{
-        int                       thid;
-        int                       nthreads;
-        PruneData *               pd;
-        int                       d;
-        int                       nchunks;
-        pthread_mutex_t **        mutex;
-        pthread_mutex_t *         upmutex;
-};
-struct
-transgroup
-{
-        int                       n;
-        Trans                     t[NTRANS];
-};
-#endif
diff --git a/src/env.c b/src/env.c
deleted file mode 100644
index 375bfa8..0000000
--- a/src/env.c
+++ /dev/null
@@ -1,60 +0,0 @@
-#define ENV_C
-#include "env.h"
-bool initialized_env = false;
-char *tabledir;
-void
-mymkdir(char *d, int m)
-{
-#ifdef _WIN32
-        mkdir(d);
-#else
-        mkdir(d, m);
-#endif
-}
-void
-init_env()
-{
-        char *nissydata = getenv("NISSYDATA");
-        char *localdata = getenv("XDG_DATA_HOME");
-        char *home      = getenv("HOME");
-        bool read, write;
-        if (initialized_env)
-                return;
-        if (nissydata != NULL) {
-                tabledir = malloc((strlen(nissydata) + 20) * sizeof(char));
-                strcpy(tabledir, nissydata);
-        } else if (localdata != NULL) {
-                tabledir = malloc((strlen(localdata) + 20) * sizeof(char));
-                strcpy(tabledir, localdata);
-                strcat(tabledir, "/nissy");
-        } else if (home != NULL) {
-                tabledir = malloc((strlen(home) + 20) * sizeof(char));
-                strcpy(tabledir, home);
-                strcat(tabledir, "/.nissy");
-        } else {
-                tabledir = malloc(20 * sizeof(char));
-                strcpy(tabledir, ".");
-        }
-        mymkdir(tabledir, 0777);
-        strcat(tabledir, "/tables");
-        mymkdir(tabledir, 0777);
-        read  = !access(tabledir, R_OK);
-        write = !access(tabledir, W_OK);
-        if (!read) {
-                fprintf(stderr, "Table files cannot be read.\n");
-        } else if (!write) {
-                fprintf(stderr, "Data directory not writable: ");
-                fprintf(stderr, "tables can be loaded, but not saved.\n");
-        }
-        initialized_env = true;
-}
diff --git a/src/env.h b/src/env.h
deleted file mode 100644
index a49d643..0000000
--- a/src/env.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef ENV_H
-#define ENV_H
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/stat.h>
-void init_env();
-extern char *tabledir;
-#endif
diff --git a/src/fst.c b/src/fst.c
deleted file mode 100644
index b51e2d4..0000000
--- a/src/fst.c
+++ /dev/null
@@ -1,401 +0,0 @@
-#define FST_C
-#include "fst.h"
-static FstCube          ep_to_fst_epos(int *ep);
-static void             init_fst_corner_invtables();
-static void             init_fst_eo_invtables();
-static void             init_fst_eo_update(uint64_t, uint64_t, int, Cube *);
-static void             init_fst_where_is_edge();
-static bool             read_fst_tables_file();
-static bool             write_fst_tables_file();
-static int edge_slice[12] = {[FR] = 0, [FL] = 0, [BL] = 0, [BR] = 0,
-                             [UL] = 1, [UR] = 1, [DR] = 1, [DL] = 1,
-                             [UF] = 2, [UB] = 2, [DF] = 2, [DB] = 2};
-static uint16_t         inv_coud[FACTORIAL8][POW3TO7];
-static uint16_t         inv_cp[FACTORIAL8];
-static uint16_t         uf_cp_to_fr_cp[FACTORIAL8];
-static uint16_t         uf_cp_to_rd_cp[FACTORIAL8];
-static uint16_t         eo_invtable[3][POW2TO11][BINOM12ON4*FACTORIAL4];
-static uint16_t         fst_where_is_edge_arr[3][12][BINOM12ON4*FACTORIAL4];
-FstCube
-cube_to_fst(Cube *cube)
-{
-        Cube c;
-        FstCube ret;
-        copy_cube(cube, &c);
-        ret.uf_eofb    = coord_eofb.i[0]->index(&c);
-        ret.uf_eposepe = coord_eposepe.i[0]->index(&c);
-        ret.uf_coud    = coord_coud.i[0]->index(&c);
-        ret.uf_cp      = coord_cp.i[0]->index(&c);
-        copy_cube(cube, &c);
-        apply_trans(fr, &c);
-        ret.fr_eofb    = coord_eofb.i[0]->index(&c);
-        ret.fr_eposepe = coord_eposepe.i[0]->index(&c);
-        ret.fr_coud    = coord_coud.i[0]->index(&c);
-        copy_cube(cube, &c);
-        apply_trans(rd, &c);
-        ret.rd_eofb    = coord_eofb.i[0]->index(&c);
-        ret.rd_eposepe = coord_eposepe.i[0]->index(&c);
-        ret.rd_coud    = coord_coud.i[0]->index(&c);
-        return ret;
-}
-static FstCube
-ep_to_fst_epos(int *ep)
-{
-        static int eind[12] = {
-                [FR] = 0, [FL] = 1, [BL] = 2, [BR] = 3,
-                [UR] = 0, [DR] = 1, [DL] = 2, [UL] = 3,
-                [DB] = 0, [DF] = 1, [UF] = 2, [UB] = 3
-        };
-        static int eptrans_fr[12] = {
-                [FR] = UF, [DF] = UL, [FL] = UB, [UF] = UR,
-                [BR] = DF, [DB] = DL, [BL] = DB, [UB] = DR,
-                [UR] = FR, [DR] = FL, [DL] = BL, [UL] = BR
-        };
-        static int eptrans_rd[12] = {
-                [DR] = UF, [FR] = UL, [UR] = UB, [BR] = UR,
-                [DL] = DF, [FL] = DL, [UL] = DB, [BL] = DR,
-                [DB] = FR, [DF] = FL, [UF] = BL, [UB] = BR
-        };
-        FstCube ret;
-        int i, ce, cs, cm;
-        int epe[4], eps[4], epm[4], epose[12], eposs[12], eposm[12];
-        memset(epose, 0, 12*sizeof(int));
-        memset(eposs, 0, 12*sizeof(int));
-        memset(eposm, 0, 12*sizeof(int));
-        for (i = 0, ce = 0; i < 12; i++) {
-                switch (edge_slice[ep[i]]) {
-                case 0:
-                        epose[i] = 1;
-                        epe[ce++] = eind[ep[i]];
-                        break;
-                case 1:
-                        eposs[eptrans_fr[i]] = eind[ep[i]] + 1;
-                        break;
-                default:
-                        eposm[eptrans_rd[i]] = eind[ep[i]] + 1;
-                        break;
-                }
-        }
-        for (i = 0, cs = 0, cm = 0; i < 12; i++) {
-                if (eposs[i]) {
-                        eps[cs++] = eposs[i] - 1;
-                        eposs[i] = 1;
-                }
-                if (eposm[i]) {
-                        epm[cm++] = eposm[i] - 1;
-                        eposm[i] = 1;
-                }
-        }
-        ret.uf_eposepe = subset_to_index(epose, 12, 4) * FACTORIAL4 +
-                         perm_to_index(epe, 4);
-        ret.fr_eposepe = subset_to_index(eposs, 12, 4) * FACTORIAL4 +
-                         perm_to_index(eps, 4);
-        ret.rd_eposepe = subset_to_index(eposm, 12, 4) * FACTORIAL4 +
-                         perm_to_index(epm, 4);
-        return ret;
-}
-FstCube
-fst_inverse(FstCube fst)
-{
-        FstCube ret;
-        int ep_inv[12];
-        ep_inv[FR] = fst_where_is_edge_arr[0][FR][fst.uf_eposepe];
-        ep_inv[FL] = fst_where_is_edge_arr[0][FL][fst.uf_eposepe];
-        ep_inv[BL] = fst_where_is_edge_arr[0][BL][fst.uf_eposepe];
-        ep_inv[BR] = fst_where_is_edge_arr[0][BR][fst.uf_eposepe];
-        ep_inv[UR] = fst_where_is_edge_arr[1][UR][fst.fr_eposepe];
-        ep_inv[UL] = fst_where_is_edge_arr[1][UL][fst.fr_eposepe];
-        ep_inv[DR] = fst_where_is_edge_arr[1][DR][fst.fr_eposepe];
-        ep_inv[DL] = fst_where_is_edge_arr[1][DL][fst.fr_eposepe];
-        ep_inv[UF] = fst_where_is_edge_arr[2][UF][fst.rd_eposepe];
-        ep_inv[UB] = fst_where_is_edge_arr[2][UB][fst.rd_eposepe];
-        ep_inv[DF] = fst_where_is_edge_arr[2][DF][fst.rd_eposepe];
-        ep_inv[DB] = fst_where_is_edge_arr[2][DB][fst.rd_eposepe];
-        ret = ep_to_fst_epos(ep_inv);
-        ret.uf_eofb = ((uint16_t)eo_invtable[0][fst.uf_eofb][fst.uf_eposepe]) |
-                      ((uint16_t)eo_invtable[1][fst.uf_eofb][fst.fr_eposepe]) |
-                      ((uint16_t)eo_invtable[2][fst.uf_eofb][fst.rd_eposepe]);
-        ret.fr_eofb = ((uint16_t)eo_invtable[0][fst.fr_eofb][fst.uf_eposepe]) |
-                      ((uint16_t)eo_invtable[1][fst.fr_eofb][fst.fr_eposepe]) |
-                      ((uint16_t)eo_invtable[2][fst.fr_eofb][fst.rd_eposepe]);
-        ret.rd_eofb = ((uint16_t)eo_invtable[0][fst.rd_eofb][fst.uf_eposepe]) |
-                      ((uint16_t)eo_invtable[1][fst.rd_eofb][fst.fr_eposepe]) |
-                      ((uint16_t)eo_invtable[2][fst.rd_eofb][fst.rd_eposepe]);
-        ret.uf_cp = inv_cp[fst.uf_cp];
-        ret.uf_coud = inv_coud[fst.uf_cp][fst.uf_coud];
-        ret.fr_coud = inv_coud[uf_cp_to_fr_cp[fst.uf_cp]][fst.fr_coud];
-        ret.rd_coud = inv_coud[uf_cp_to_rd_cp[fst.uf_cp]][fst.rd_coud];
-        return ret;
-}
-FstCube
-fst_move(Move m, FstCube fst)
-{
-        FstCube ret;
-        Move m_fr, m_rd;
-        m_fr = transform_move(fr, m);
-        m_rd = transform_move(rd, m);
-        ret.uf_eofb    = coord_eofb.mtable[m][fst.uf_eofb];
-        ret.uf_eposepe = coord_eposepe.mtable[m][fst.uf_eposepe];
-        ret.uf_coud    = coord_coud.mtable[m][fst.uf_coud];
-        ret.uf_cp      = coord_cp.mtable[m][fst.uf_cp];
-        ret.fr_eofb    = coord_eofb.mtable[m_fr][fst.fr_eofb];
-        ret.fr_eposepe = coord_eposepe.mtable[m_fr][fst.fr_eposepe];
-        ret.fr_coud    = coord_coud.mtable[m_fr][fst.fr_coud];
-        ret.rd_eofb    = coord_eofb.mtable[m_rd][fst.rd_eofb];
-        ret.rd_eposepe = coord_eposepe.mtable[m_rd][fst.rd_eposepe];
-        ret.rd_coud    = coord_coud.mtable[m_rd][fst.rd_coud];
-        return ret;
-}
-void
-fst_to_cube(FstCube fst, Cube *cube)
-{
-        Cube e, s, m;
-        int i;
-        coord_eposepe.i[0]->to_cube(fst.uf_eposepe, &e);
-        coord_eposepe.i[0]->to_cube(fst.fr_eposepe, &s);
-        apply_trans(inverse_trans(fr), &s);
-        coord_eposepe.i[0]->to_cube(fst.rd_eposepe, &m);
-        apply_trans(inverse_trans(rd), &m);
-        for (i = 0; i < 12; i++) {
-                if (edge_slice[e.ep[i]] == 0)
-                        cube->ep[i] = e.ep[i];
-                if (edge_slice[s.ep[i]] == 1)
-                        cube->ep[i] = s.ep[i];
-                if (edge_slice[m.ep[i]] == 2)
-                        cube->ep[i] = m.ep[i];
-        }
-        coord_eofb.i[0]->to_cube((uint64_t)fst.uf_eofb, cube);
-        coord_coud.i[0]->to_cube((uint64_t)fst.uf_coud, cube);
-        coord_cp.i[0]->to_cube((uint64_t)fst.uf_cp, cube);
-        for (i = 0; i < 6; i++)
-                cube->xp[i] = i;
-}
-void
-init_fst()
-{
-        init_trans();
-        gen_coord(&coord_eofb);
-        gen_coord(&coord_eposepe);
-        gen_coord(&coord_coud);
-        gen_coord(&coord_cp);
-        if (!read_fst_tables_file()) {
-                fprintf(stderr,
-                    "Could not load fst_tables, generating them\n");
-                init_fst_corner_invtables();
-                init_fst_eo_invtables();
-                init_fst_where_is_edge();
-                if (!write_fst_tables_file())
-                        fprintf(stderr, "fst_tables could not be written\b");
-        }
-}
-static void
-init_fst_corner_invtables()
-{
-        Cube c, d;
-        uint64_t cp, coud;
-        for (cp = 0; cp < FACTORIAL8; cp++) {
-                make_solved_corners(&c);
-                coord_cp.i[0]->to_cube(cp, &c);
-                copy_cube_corners(&c, &d);
-                invert_cube_corners(&d);
-                inv_cp[cp] = coord_cp.i[0]->index(&d);
-                for (coud = 0; coud < POW3TO7; coud++) {
-                        copy_cube_corners(&c, &d);
-                        coord_coud.i[0]->to_cube(coud, &d);
-                        invert_cube_corners(&d);
-                        inv_coud[cp][coud] = coord_coud.i[0]->index(&d);
-                }
-                copy_cube_corners(&c, &d);
-                apply_trans(fr, &d);
-                uf_cp_to_fr_cp[cp] = coord_cp.i[0]->index(&d);
-                copy_cube_corners(&c, &d);
-                apply_trans(rd, &d);
-                uf_cp_to_rd_cp[cp] = coord_cp.i[0]->index(&d);
-        }
-}
-static void
-init_fst_eo_invtables()
-{
-        uint64_t ep, eo;
-        Cube c, d;
-        for (ep = 0; ep < BINOM12ON4 * FACTORIAL4; ep++) {
-                make_solved(&c);
-                coord_eposepe.i[0]->to_cube(ep, &c);
-                for (eo = 0; eo < POW2TO11; eo++) {
-                        copy_cube_edges(&c, &d);
-                        coord_eofb.i[0]->to_cube(eo, &d);
-                        init_fst_eo_update(eo, ep, 0, &d);
-                        apply_trans(inverse_trans(fr), &d);
-                        coord_eofb.i[0]->to_cube(eo, &d);
-                        init_fst_eo_update(eo, ep, 1, &d);
-                        copy_cube_edges(&c, &d);
-                        apply_trans(inverse_trans(rd), &d);
-                        coord_eofb.i[0]->to_cube(eo, &d);
-                        init_fst_eo_update(eo, ep, 2, &d);
-                }
-        }
-}
-static void
-init_fst_eo_update(uint64_t eo, uint64_t ep, int s, Cube *d)
-{
-        int i;
-        for (i = 0; i < 12; i++) {
-                if (edge_slice[d->ep[i]] == s && d->eo[i] && d->ep[i] != 11)
-                        eo_invtable[s][eo][ep] |=
-                            ((uint16_t)1) << ((uint16_t)d->ep[i]);
-        }
-}
-static void
-init_fst_where_is_edge()
-{
-        Cube c, d;
-        uint64_t e;
-        make_solved(&c);
-        for (e = 0; e < BINOM12ON4 * FACTORIAL4; e++) {
-                coord_eposepe.i[0]->to_cube(e, &c);
-                copy_cube_edges(&c, &d);
-                fst_where_is_edge_arr[0][FR][e] = where_is_edge(FR, &d);
-                fst_where_is_edge_arr[0][FL][e] = where_is_edge(FL, &d);
-                fst_where_is_edge_arr[0][BL][e] = where_is_edge(BL, &d);
-                fst_where_is_edge_arr[0][BR][e] = where_is_edge(BR, &d);
-                copy_cube_edges(&c, &d);
-                apply_trans(inverse_trans(fr), &d);
-                fst_where_is_edge_arr[1][UL][e] = where_is_edge(UL, &d);
-                fst_where_is_edge_arr[1][UR][e] = where_is_edge(UR, &d);
-                fst_where_is_edge_arr[1][DL][e] = where_is_edge(DL, &d);
-                fst_where_is_edge_arr[1][DR][e] = where_is_edge(DR, &d);
-                copy_cube_edges(&c, &d);
-                apply_trans(inverse_trans(rd), &d);
-                fst_where_is_edge_arr[2][UF][e] = where_is_edge(UF, &d);
-                fst_where_is_edge_arr[2][UB][e] = where_is_edge(UB, &d);
-                fst_where_is_edge_arr[2][DF][e] = where_is_edge(DF, &d);
-                fst_where_is_edge_arr[2][DB][e] = where_is_edge(DB, &d);
-        }
-}
-static bool
-read_fst_tables_file()
-{
-        init_env();
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        uint64_t i, j, r, total;
-        strcpy(fname, tabledir);
-        strcat(fname, "/fst_tables");
-        if ((f = fopen(fname, "rb")) == NULL)
-                return false;
-        r = 0;
-        total = FACTORIAL8*(POW3TO7+3) + 3*BINOM12ON4*FACTORIAL4*(12+POW2TO11);
-        for (i = 0; i < FACTORIAL8; i++)
-                r += fread(inv_coud[i], sizeof(uint16_t), POW3TO7, f);
-        r += fread(inv_cp, sizeof(uint16_t), FACTORIAL8, f);
-        r += fread(uf_cp_to_fr_cp, sizeof(uint16_t), FACTORIAL8, f);
-        r += fread(uf_cp_to_rd_cp, sizeof(uint16_t), FACTORIAL8, f);
-        for (i = 0; i < 3; i++)
-                for (j = 0; j < POW2TO11; j++)
-                        r += fread(eo_invtable[i][j],
-                            sizeof(uint16_t), BINOM12ON4*FACTORIAL4, f);
-        for (i = 0; i < 3; i++)
-                for (j = 0; j < 12; j++)
-                        r += fread(fst_where_is_edge_arr[i][j],
-                            sizeof(uint16_t), BINOM12ON4*FACTORIAL4, f);
-        fclose(f);
-        return r == total;
-}
-static bool
-write_fst_tables_file()
-{
-        init_env();
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        uint64_t i, j, w, total;
-        strcpy(fname, tabledir);
-        strcat(fname, "/fst_tables");
-        if ((f = fopen(fname, "wb")) == NULL)
-                return false;
-        w = 0;
-        total = FACTORIAL8*(POW3TO7+3) + 3*BINOM12ON4*FACTORIAL4*(12+POW2TO11);
-        for (i = 0; i < FACTORIAL8; i++)
-                w += fwrite(inv_coud[i], sizeof(uint16_t), POW3TO7, f);
-        w += fwrite(inv_cp, sizeof(uint16_t), FACTORIAL8, f);
-        w += fwrite(uf_cp_to_fr_cp, sizeof(uint16_t), FACTORIAL8, f);
-        w += fwrite(uf_cp_to_rd_cp, sizeof(uint16_t), FACTORIAL8, f);
-        for (i = 0; i < 3; i++)
-                for (j = 0; j < POW2TO11; j++)
-                        w += fwrite(eo_invtable[i][j],
-                            sizeof(uint16_t), BINOM12ON4*FACTORIAL4, f);
-        for (i = 0; i < 3; i++)
-                for (j = 0; j < 12; j++)
-                        w += fwrite(fst_where_is_edge_arr[i][j],
-                            sizeof(uint16_t), BINOM12ON4*FACTORIAL4, f);
-        fclose(f);
-        return w == total;
-}
diff --git a/src/fst.h b/src/fst.h
deleted file mode 100644
index c3b226c..0000000
--- a/src/fst.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef FST_H
-#define FST_H
-#include "coord.h"
-FstCube     cube_to_fst(Cube *cube);
-FstCube     fst_inverse(FstCube fst);
-FstCube     fst_move(Move m, FstCube fst);
-void        fst_to_cube(FstCube fst, Cube *cube);
-void        init_fst();
-#endif
diff --git a/src/moves.c b/src/moves.c
deleted file mode 100644
index a9dfdc0..0000000
--- a/src/moves.c
+++ /dev/null
@@ -1,301 +0,0 @@
-#define MOVES_C
-#include "moves.h"
-/* Local functions ***********************************************************/
-static void        cleanup_aux(Alg *alg, Alg *ret, bool inv);
-/* Tables and other data *****************************************************/
-/* Moves are represented as cubes and applied using compose(). Every move is *
- * translated to a an <U, x, y> alg before filling the transition tables.    *
- * See init_moves().                                                         */
-static Cube move_array[NMOVES];
-static char equiv_alg_string[100][NMOVES] = {
-        [NULLMOVE] = "",
-        [U]   = "        U           ",
-        [U2]  = "        UU          ",
-        [U3]  = "        UUU         ",
-        [D]   = "  xx    U    xx      ",
-        [D2]  = "  xx    UU   xx      ",
-        [D3]  = "  xx    UUU  xx      ",
-        [R]   = "  yx    U    xxxyyy  ",
-        [R2]  = "  yx    UU   xxxyyy  ",
-        [R3]  = "  yx    UUU  xxxyyy  ",
-        [L]   = "  yyyx  U    xxxy    ",
-        [L2]  = "  yyyx  UU   xxxy    ",
-        [L3]  = "  yyyx  UUU  xxxy    ",
-        [F]   = "  x     U    xxx     ",
-        [F2]  = "  x     UU   xxx     ",
-        [F3]  = "  x     UUU  xxx     ",
-        [B]   = "  xxx   U    x       ",
-        [B2]  = "  xxx   UU   x       ",
-        [B3]  = "  xxx   UUU  x       ",
-        [Uw]  = "  xx    U    xx      y        ",
-        [Uw2] = "  xx    UU   xx      yy       ",
-        [Uw3] = "  xx    UUU  xx      yyy      ",
-        [Dw]  = "        U            yyy      ",
-        [Dw2] = "        UU           yy       ",
-        [Dw3] = "        UUU          y        ",
-        [Rw]  = "  yyyx  U    xxxy    x        ",
-        [Rw2] = "  yyyx  UU   xxxy    xx       ",
-        [Rw3] = "  yyyx  UUU  xxxy    xxx      ",
-        [Lw]  = "  yx    U    xxxyyy  xxx      ",
-        [Lw2] = "  yx    UU   xxxyyy  xx       ",
-        [Lw3] = "  yx    UUU  xxxyyy  x        ",
-        [Fw]  = "  xxx   U    x       yxxxyyy  ",
-        [Fw2] = "  xxx   UU   x       yxxyyy   ",
-        [Fw3] = "  xxx   UUU  x       yxyyy    ",
-        [Bw]  = "  x     U    xxx     yxyyy    ",
-        [Bw2] = "  x     UU   xxx     yxxyyy   ",
-        [Bw3] = "  x     UUU  xxx     yxxxyyy  ",
-        [M]   = "  yx  U    xx  UUU  yxyyy  ",
-        [M2]  = "  yx  UU   xx  UU   xxxy   ",
-        [M3]  = "  yx  UUU  xx  U    yxxxy  ",
-        [S]   = "  x   UUU  xx  U    yyyx   ",
-        [S2]  = "  x   UU   xx  UU   yyx    ",
-        [S3]  = "  x   U    xx  UUU  yx     ",
-        [E]   = "      U    xx  UUU  xxyyy  ",
-        [E2]  = "      UU   xx  UU   xxyy   ",
-        [E3]  = "      UUU  xx  U    xxy    ",
-        [x]   = "       x         ",
-        [x2]  = "       xx        ",
-        [x3]  = "       xxx       ",
-        [y]   = "       y         ",
-        [y2]  = "       yy        ",
-        [y3]  = "       yyy       ",
-        [z]   = "  yyy  x    y    ",
-        [z2]  = "  yy   xx        ",
-        [z3]  = "  y    x    yyy  "
-};
-/* Public functions **********************************************************/
-void
-apply_alg(Alg *alg, Cube *cube)
-{
-        Cube aux;
-        int i;
-        copy_cube(cube, &aux);
-        make_solved(cube);
-        for (i = 0; i < alg->len; i++)
-                if (alg->inv[i])
-                        apply_move(alg->move[i], cube);
-        invert_cube(cube);
-        compose(&aux, cube);
-        for (i = 0; i < alg->len; i++)
-                if (!alg->inv[i])
-                        apply_move(alg->move[i], cube);
-}
-void
-apply_move(Move m, Cube *cube)
-{
-        compose(&move_array[m], cube);
-}
-void
-apply_move_centers(Move m, Cube *cube)
-{
-        compose_centers(&move_array[m], cube);
-}
-void
-apply_move_corners(Move m, Cube *cube)
-{
-        compose_corners(&move_array[m], cube);
-}
-void
-apply_move_edges(Move m, Cube *cube)
-{
-        compose_edges(&move_array[m], cube);
-}
-Alg *
-cleanup(Alg *alg)
-{
-        int i, j, k, b[2], n, L;
-        Move bb, m;
-        Alg *ret;
-        ret = new_alg("");
-        cleanup_aux(alg, ret, false);
-        cleanup_aux(alg, ret, true);
-        do {
-                for (i = 0, j = 0, n = 0; i < ret->len; i = j) {
-                        if (ret->move[i] > B3) {
-                                ret->move[n] = ret->move[i];
-                                ret->inv[n] = ret->inv[i];
-                                n++;
-                                j++;
-                                continue;
-                        }
-                        bb = 1 + ((base_move(ret->move[i]) - 1)/6)*6;
-                        while (j < ret->len &&
-                               ret->move[j] <= B3 &&
-                               ret->inv[j] == ret->inv[i] &&
-                               1 + ((base_move(ret->move[j]) - 1)/6)*6 == bb)
-                                j++;
-                        
-                        for (k = i, b[0] = 0, b[1] = 0; k < j; k++) {
-                                m = ret->move[k];
-                                if (base_move(m) == bb)
-                                        b[0] = (b[0]+1+m-base_move(m)) % 4;
-                                else
-                                        b[1] = (b[1]+1+m-base_move(m)) % 4;
-                        }
-                        for (k = 0; k < 2; k++) {
-                                if (b[k] != 0) {
-                                        ret->move[n] = bb + b[k] - 1 + 3*k;
-                                        ret->inv[n] = ret->inv[i];
-                                        n++;
-                                }
-                        }
-                }
-                L = ret->len;
-                ret->len = n;
-        } while (L != n);
-        return ret;
-}
-static void
-cleanup_aux(Alg *alg, Alg *ret, bool inv)
-{
-        int i, j;
-        Cube c, d;
-        Move m;
-        Alg *equiv_alg;
-        
-        make_solved(&c);
-        for (i = 0; i < alg->len; i++) {
-                if (alg->inv[i] != inv)
-                        continue;
-                equiv_alg = new_alg(equiv_alg_string[alg->move[i]]);
-                for (j = 0; j < equiv_alg->len; j++)
-                        if (equiv_alg->move[j] == U)
-                                append_move(ret, 3 * c.xp[U_center] + 1, inv);
-                        else
-                                apply_move(equiv_alg->move[j], &c);
-                free_alg(equiv_alg);
-        }
-        m = NULLMOVE;
-        switch (c.xp[F_center]) {
-        case U_center:
-                m = x3;
-                break;
-        case D_center:
-                m = x;
-                break;
-        case R_center:
-                m = y;
-                break;
-        case L_center:
-                m = y3;
-                break;
-        case B_center:
-                if (c.xp[U_center] == U_center)
-                        m = y2;
-                else
-                        m = x2;
-                break;
-        default:
-                break;
-        }
-        make_solved(&d);
-        apply_move(m, &d);
-        if (m != NULLMOVE)
-                append_move(ret, m, inv);
-        m = NULLMOVE;
-        if (c.xp[U_center] == d.xp[D_center]) {
-                m = z2;
-        } else if (c.xp[U_center] == d.xp[R_center]) {
-                m = z3;
-        } else if (c.xp[U_center] == d.xp[L_center]) {
-                m = z;
-        }
-        if (m != NULLMOVE)
-                append_move(ret, m, inv);
-}
-void
-init_moves() {
-        static bool initialized = false;
-        if (initialized)
-                return;
-        initialized = true;
-        Move m;
-        Alg *equiv_alg[NMOVES];
-        static const Cube mcu = {
-                .ep = { UR, UF, UL, UB, DF, DL, DB, DR, FR, FL, BL, BR },
-                .cp = { UBR, UFR, UFL, UBL, DFR, DFL, DBL, DBR },
-        };
-        static const Cube mcx = {
-                .ep = { DF, FL, UF, FR, DB, BL, UB, BR, DR, DL, UL, UR },
-                .eo = { [UF] = 1, [UB] = 1, [DF] = 1, [DB] = 1 },
-                .cp = { DFR, DFL, UFL, UFR, DBR, DBL, UBL, UBR },
-                .co = { [UFR] = 2, [UBR] = 1, [UFL] = 1, [UBL] = 2,
-                        [DBR] = 2, [DFR] = 1, [DBL] = 1, [DFL] = 2 },
-                .xp = { F_center, B_center, R_center,
-                        L_center, D_center, U_center },
-        };
-        static const Cube mcy = {
-                .ep = { UR, UF, UL, UB, DR, DF, DL, DB, BR, FR, FL, BL },
-                .eo = { [FR] = 1, [FL] = 1, [BL] = 1, [BR] = 1 },
-                .cp = { UBR, UFR, UFL, UBL, DBR, DFR, DFL, DBL },
-                .xp = { U_center, D_center, B_center,
-                        F_center, R_center, L_center },
-        };
-        move_array[U] = mcu;
-        move_array[x] = mcx;
-        move_array[y] = mcy;
-        for (m = 0; m < NMOVES; m++)
-                equiv_alg[m] = new_alg(equiv_alg_string[m]);
-        for (m = 0; m < NMOVES; m++) {
-                switch (m) {
-                case NULLMOVE:
-                        make_solved(&move_array[m]);
-                        break;
-                case U:
-                case x:
-                case y:
-                        break;
-                default:
-                        make_solved(&move_array[m]);
-                        apply_alg(equiv_alg[m], &move_array[m]);
-                        break;
-                }
-        }
-        for (m = 0; m < NMOVES; m++)
-                free_alg(equiv_alg[m]);
-}
diff --git a/src/moves.h b/src/moves.h
deleted file mode 100644
index 4e8be7f..0000000
--- a/src/moves.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef MOVES_H
-#define MOVES_H
-#include "alg.h"
-#include "cube.h"
-#include "env.h"
-void        apply_alg(Alg *alg, Cube *cube);
-void        apply_move(Move m, Cube *cube);
-void        apply_move_centers(Move m, Cube *cube);
-void        apply_move_corners(Move m, Cube *cube);
-void        apply_move_edges(Move m, Cube *cube);
-Alg *       cleanup(Alg *alg);
-void        init_moves();
-#endif
diff --git a/src/movesets.c b/src/movesets.c
deleted file mode 100644
index d8f5bc1..0000000
--- a/src/movesets.c
+++ /dev/null
@@ -1,194 +0,0 @@
-#define MOVESETS_C
-#include "movesets.h"
-static bool allowed_HTM(Move m);
-static bool allowed_URF(Move m);
-static bool allowed_eofb(Move m);
-static bool allowed_drud(Move m);
-static bool allowed_htr(Move m);
-static bool can_append_HTM(Move l2, Move l1, Move m);
-static bool can_append_HTM_cached(Alg *alg, Move m, bool inverse);
-static bool cancel_niss_HTM_cached(Alg *alg);
-static void init_can_append_HTM();
-Moveset
-moveset_HTM = {
-        .name        = "HTM",
-        .allowed     = allowed_HTM,
-        .can_append  = can_append_HTM_cached,
-        .cancel_niss = cancel_niss_HTM_cached,
-};
-Moveset
-moveset_URF = {
-        .name        = "URF",
-        .allowed     = allowed_URF,
-        .can_append  = can_append_HTM_cached,
-        .cancel_niss = cancel_niss_HTM_cached,
-};
-Moveset
-moveset_eofb = {
-        .name        = "eofb",
-        .allowed     = allowed_eofb,
-        .can_append  = can_append_HTM_cached,
-        .cancel_niss = cancel_niss_HTM_cached,
-};
-Moveset
-moveset_drud = {
-        .name        = "drud",
-        .allowed     = allowed_drud,
-        .can_append  = can_append_HTM_cached,
-        .cancel_niss = cancel_niss_HTM_cached,
-};
-Moveset
-moveset_htr = {
-        .name        = "htr",
-        .allowed     = allowed_htr,
-        .can_append  = can_append_HTM_cached,
-        .cancel_niss = cancel_niss_HTM_cached,
-};
-Moveset *
-all_movesets[] = {
-        &moveset_HTM,
-        &moveset_URF,
-        &moveset_eofb,
-        &moveset_drud,
-        &moveset_htr,
-        NULL
-};
-static uint64_t can_append_HTM_mask[NMOVES][NMOVES];
-static bool
-allowed_HTM(Move m)
-{
-        return m >= U && m <= B3;
-}
-static bool
-allowed_URF(Move m)
-{
-        Move b = base_move(m);
-        return b == U || b == R || b == F;
-}
-static bool
-allowed_eofb(Move m)
-{
-        Move b = base_move(m);
-        return b == U || b == D || b == R || b == L ||
-               ((b == F || b == B) && m == b+1);
-}
-static bool
-allowed_drud(Move m)
-{
-        Move b = base_move(m);
-        return b == U || b == D ||
-               ((b == R || b == L || b == F || b == B) && m == b + 1);
-}
-static bool
-allowed_htr(Move m)
-{
-        Move b = base_move(m);
-        return moveset_HTM.allowed(m) && m == b + 1;
-}
-static bool
-can_append_HTM(Move l2, Move l1, Move m)
-{
-        bool cancel, cancel_last, cancel_swap;
-        cancel_last = l1 != NULLMOVE && base_move(l1) == base_move(m);
-        cancel_swap = l2 != NULLMOVE && base_move(l2) == base_move(m);
-        cancel = cancel_last || (commute(l1, l2) && cancel_swap);
-        return !cancel;
-}
-static bool
-can_append_HTM_cached(Alg *alg, Move m, bool inverse)
-{
-        Move *moves, l1, l2;
-        uint64_t mbit;
-        int n;
-        if (inverse) {
-                moves = alg->move_inverse;
-                n = alg->len_inverse;
-        } else {
-                moves = alg->move_normal;
-                n = alg->len_normal;
-        }
-        l1 = n > 0 ? moves[n-1] : NULLMOVE;
-        l2 = n > 1 ? moves[n-2] : NULLMOVE;
-        mbit = ((uint64_t)1) << m;
-        return can_append_HTM_mask[l2][l1] & mbit;
-}
-static bool
-cancel_niss_HTM_cached(Alg *alg)
-{
-        Move i1, i2;
-        int n;
-        bool can_first, can_swap;
-        n = alg->len_inverse;
-        i1 = n > 0 ? alg->move_inverse[n-1] : NULLMOVE;
-        i2 = n > 1 ? alg->move_inverse[n-2] : NULLMOVE;
-        can_first = can_append_HTM_cached(alg, inverse_move(i1), false);
-        can_swap  = can_append_HTM_cached(alg, inverse_move(i2), false);
-        return can_first && (!commute(i1, i2) || can_swap);
-}
-static void
-init_can_append_HTM()
-{
-        Move l2, l1, m;
-        for (l1 = 0; l1 < NMOVES; l1++)
-                for (l2 = 0; l2 < NMOVES; l2++)
-                        for (m = 0; m < NMOVES; m++)
-                                if (can_append_HTM(l2, l1, m))
-                                        can_append_HTM_mask[l2][l1]
-                                            |= (((uint64_t)1) << m);
-}
-void
-init_moveset(Moveset *ms)
-{
-        int j;
-        Move m;
-        for (j = 0, m = U; m < NMOVES; m++)
-                if (ms->allowed(m))
-                        ms->sorted_moves[j++] = m;
-        ms->sorted_moves[j] = NULLMOVE;
-/* TODO: should be here? maybe just init all movesets together anyway... */
-        init_can_append_HTM();
-}
-void
-init_movesets()
-{
-        int i;
-        for (i = 0; all_movesets[i] != NULL; i++)
-                init_moveset(all_movesets[i]);
-}
diff --git a/src/movesets.h b/src/movesets.h
deleted file mode 100644
index a02d171..0000000
--- a/src/movesets.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef MOVESETS_H
-#define MOVESETS_H
-#include "alg.h"
-void init_moveset(Moveset *);
-void init_movesets();
-extern Moveset moveset_HTM;
-extern Moveset moveset_URF;
-extern Moveset moveset_eofb;
-extern Moveset moveset_drud;
-extern Moveset moveset_htr;
-#endif
diff --git a/src/pruning.c b/src/pruning.c
deleted file mode 100644
index 3cc9152..0000000
--- a/src/pruning.c
+++ /dev/null
@@ -1,400 +0,0 @@
-#define PRUNING_C
-#include "pruning.h"
-#define ENTRIES_PER_GROUP              (2*sizeof(entry_group_t))
-#define ENTRIES_PER_GROUP_COMPACT      (4*sizeof(entry_group_t))
-static int         findchunk(PruneData *pd, int nchunks, uint64_t i);
-static void        genptable_bfs(PruneData *pd, int d, int nt, int nc);
-static void        genptable_fixnasty(PruneData *pd, int d, int nthreads);
-static void *      instance_bfs(void *arg);
-static void *      instance_fixnasty(void *arg);
-static void        ptable_update(PruneData *pd, uint64_t ind, int m);
-static bool        read_ptable_file(PruneData *pd);
-static bool        write_ptable_file(PruneData *pd);
-PruneData *active_pd[256];
-int
-findchunk(PruneData *pd, int nchunks, uint64_t i)
-{
-        uint64_t chunksize;
-        chunksize = pd->coord->max / (uint64_t)nchunks;
-        chunksize += ENTRIES_PER_GROUP - (chunksize % ENTRIES_PER_GROUP);
-        return MIN(nchunks-1, (int)(i / chunksize));
-}
-PruneData *
-genptable(PruneData *pd, int nthreads)
-{
-        int d, nchunks, i, maxv;
-        uint64_t oldn;
-        for (i = 0; active_pd[i] != NULL; i++) {
-                if (active_pd[i]->coord == pd->coord &&
-                    active_pd[i]->moveset == pd->moveset &&
-                    active_pd[i]->compact == pd->compact)
-                        return active_pd[i];
-        }
-        init_moveset(pd->moveset);
-        gen_coord(pd->coord);
-        pd->ptable = malloc(ptablesize(pd) * sizeof(entry_group_t));
-        if (read_ptable_file(pd))
-                goto genptable_done;
-        if (nthreads < 4) {
-                fprintf(stderr,
-                        "--- Warning ---\n"
-                        "You are using only %d threads to generate the pruning"
-                        "tables. This can take a while.\n"
-                        "Unless you did this intentionally, you should re-run"
-                        "this command with `-t 4' or more.\n"
-                        "---------------\n\n", nthreads
-                );
-        }
-        nchunks = MIN(ptablesize(pd), 100000);
-        fprintf(stderr, "Generating pt_%s_%s with %d threads\n",
-                        pd->coord->name, pd->moveset->name, nthreads); 
-        memset(pd->ptable, ~(uint8_t)0, ptablesize(pd)*sizeof(entry_group_t));
-        for (i = 0; i < 16; i++)
-                pd->count[i] = 0;
-        ptable_update(pd, 0, 0);
-        pd->n = 1;
-        oldn = 0;
-        genptable_fixnasty(pd, 0, nthreads);
-        fprintf(stderr, "Depth %d done, generated %"
-                PRIu64 "\t(%" PRIu64 "/%" PRIu64 ")\n",
-                0, pd->n - oldn, pd->n, pd->coord->max);
-        oldn = pd->n;
-        pd->count[0] = pd->n;
-        maxv = pd->compact ? MIN(15, pd->base + 4) : 15;
-        for (d = 0; d < maxv && pd->n < pd->coord->max; d++) {
-                genptable_bfs(pd, d, nthreads, nchunks);
-                genptable_fixnasty(pd, d+1, nthreads);
-                fprintf(stderr, "Depth %d done, generated %"
-                        PRIu64 "\t(%" PRIu64 "/%" PRIu64 ")\n",
-                        d+1, pd->n - oldn, pd->n, pd->coord->max);
-                pd->count[d+1] = pd->n - oldn;
-                oldn = pd->n;
-        }
-        if (pd->compact)
-                fprintf(stderr, "Compact table, values above "
-                                "%d are inaccurate.\n", maxv-1);
-        fprintf(stderr, "Pruning table generated!\n");
-        if (!write_ptable_file(pd))
-                fprintf(stderr, "Error writing ptable file\n");
-genptable_done:
-        for (i = 0; active_pd[i] != NULL; i++);
-        return active_pd[i] = pd;
-}
-static void
-genptable_bfs(PruneData *pd, int d, int nthreads, int nchunks)
-{
-        int i;
-        pthread_t t[nthreads];
-        ThreadDataGenpt td[nthreads];
-        pthread_mutex_t *mtx[nchunks], *upmtx;
-        upmtx = malloc(sizeof(pthread_mutex_t));
-        pthread_mutex_init(upmtx, NULL);
-        for (i = 0; i < nchunks; i++) {
-                mtx[i] = malloc(sizeof(pthread_mutex_t));
-                pthread_mutex_init(mtx[i], NULL);
-        }
-        for (i = 0; i < nthreads; i++) {
-                td[i].thid     = i;
-                td[i].nthreads = nthreads;
-                td[i].pd       = pd;
-                td[i].d        = d;
-                td[i].nchunks  = nchunks;
-                td[i].mutex    = mtx;
-                td[i].upmutex  = upmtx;
-                pthread_create(&t[i], NULL, instance_bfs, &td[i]);
-        }
-        for (i = 0; i < nthreads; i++)
-                pthread_join(t[i], NULL);
-        free(upmtx);
-        for (i = 0; i < nchunks; i++)
-                free(mtx[i]);
-}
-static void
-genptable_fixnasty(PruneData *pd, int d, int nthreads)
-{
-        int i;
-        pthread_t t[nthreads];
-        ThreadDataGenpt td[nthreads];
-        pthread_mutex_t *upmtx;
-        if (pd->coord->type != SYMCOMP_COORD)
-                return;
-        upmtx = malloc(sizeof(pthread_mutex_t));
-        pthread_mutex_init(upmtx, NULL);
-        for (i = 0; i < nthreads; i++) {
-                td[i].thid     = i;
-                td[i].nthreads = nthreads;
-                td[i].pd       = pd;
-                td[i].d        = d;
-                td[i].upmutex  = upmtx;
-                pthread_create(&t[i], NULL, instance_fixnasty, &td[i]);
-        }
-        for (i = 0; i < nthreads; i++)
-                pthread_join(t[i], NULL);
-        free(upmtx);
-}
-static void *
-instance_bfs(void *arg)
-{
-        ThreadDataGenpt *td;
-        uint64_t i, ii, blocksize, rmin, rmax, updated;
-        int j, pval, ichunk, oldc, newc;
-        Move *ms;
-        td = (ThreadDataGenpt *)arg;
-        ms = td->pd->moveset->sorted_moves;
-        blocksize = td->pd->coord->max / (uint64_t)td->nthreads;
-        rmin = ((uint64_t)td->thid) * blocksize;
-        rmax = td->thid == td->nthreads - 1 ?
-               td->pd->coord->max :
-               ((uint64_t)td->thid + 1) * blocksize;
-        if (td->pd->compact) {
-                if (td->d <= td->pd->base) {
-                        oldc = 1;
-                        newc = 1;
-                } else {
-                        oldc = td->d - td->pd->base;
-                        newc = td->d - td->pd->base;
-                }
-        } else {
-                oldc = td->d;
-                newc = td->d + 1;
-        }
-        updated = 0;
-        for (i = rmin; i < rmax; i++) {
-                ichunk = findchunk(td->pd, td->nchunks, i);
-                pthread_mutex_lock(td->mutex[ichunk]);
-                pval = ptableval(td->pd, i);
-                pthread_mutex_unlock(td->mutex[ichunk]);
-                if (pval == oldc) {
-                        for (j = 0; ms[j] != NULLMOVE; j++) {
-                                ii = move_coord(td->pd->coord, ms[j], i, NULL);
-                                ichunk = findchunk(td->pd, td->nchunks, ii);
-                                pthread_mutex_lock(td->mutex[ichunk]);
-                                pval = ptableval(td->pd, ii);
-                                if (pval > newc) {
-                                        ptable_update(td->pd, ii, newc);
-                                        updated++;
-                                }
-                                pthread_mutex_unlock(td->mutex[ichunk]);
-                        }
-                        if (td->pd->compact && td->d <= td->pd->base) {
-                                ichunk = findchunk(td->pd, td->nchunks, i);
-                                pthread_mutex_lock(td->mutex[ichunk]);
-                                ptable_update(td->pd, i, 0);
-                                pthread_mutex_unlock(td->mutex[ichunk]);
-                        }
-                }
-        }
-        pthread_mutex_lock(td->upmutex);
-        td->pd->n += updated;
-        pthread_mutex_unlock(td->upmutex);
-        return NULL;
-}
-static void *
-instance_fixnasty(void *arg)
-{
-        ThreadDataGenpt *td;
-        uint64_t i, ii, blocksize, rmin, rmax, updated, ss, M;
-        int j, oldc;
-        Trans t;
-        td = (ThreadDataGenpt *)arg;
-        /* We know type = SYMCOMP_COORD */
-        M = td->pd->coord->base[1]->max;
-        blocksize = (td->pd->coord->base[0]->max / td->nthreads) * M;
-        rmin = ((uint64_t)td->thid) * blocksize;
-        rmax = td->thid == td->nthreads - 1 ?
-               td->pd->coord->max :
-               ((uint64_t)td->thid + 1) * blocksize;
-        if (td->pd->compact) {
-                if (td->d <= td->pd->base)
-                        oldc = 1;
-                else
-                        oldc = td->d - td->pd->base;
-        } else {
-                oldc = td->d;
-        }
-        updated = 0;
-        for (i = rmin; i < rmax; i++) {
-                if (ptableval(td->pd, i) == oldc) {
-                        ss = td->pd->coord->base[0]->selfsim[i/M];
-                        for (j = 0; j < td->pd->coord->base[0]->tgrp->n; j++) {
-                                t = td->pd->coord->base[0]->tgrp->t[j];
-                                if (t == uf || !(ss & ((uint64_t)1<<t)))
-                                        continue;
-                                ii = trans_coord(td->pd->coord, t, i);
-                                if (ptableval(td->pd, ii) > oldc) {
-                                        ptable_update(td->pd, ii, oldc);
-                                        updated++;
-                                }
-                        }
-                }
-        }
-        pthread_mutex_lock(td->upmutex);
-        td->pd->n += updated;
-        pthread_mutex_unlock(td->upmutex);
-        return NULL;
-}
-void
-print_ptable(PruneData *pd)
-{
-        uint64_t i;
-        printf("Table %s_%s\n", pd->coord->name, pd->moveset->name);
-        if (pd->compact) {
-                printf("Compract table with base value: %d\n", pd->base);
-                printf("Values above %d are inaccurate.\n", pd->base + 3);
-        }
-        for (i = 0; i < 16; i++)
-                printf("%2" PRIu64 "\t%10" PRIu64 "\n", i, pd->count[i]);
-}
-uint64_t
-ptablesize(PruneData *pd)
-{
-        uint64_t e;
-        e = pd->compact ? ENTRIES_PER_GROUP_COMPACT : ENTRIES_PER_GROUP;
-        return (pd->coord->max + e - 1) / e;
-}
-static void
-ptable_update(PruneData *pd, uint64_t ind, int n)
-{
-        int sh;
-        entry_group_t f, mask;
-        uint64_t i, e, b;
-        e = pd->compact ? ENTRIES_PER_GROUP_COMPACT : ENTRIES_PER_GROUP;
-        b = pd->compact ? 2 : 4;
-        f = pd->compact ? 3 : 15;
-        sh = b * (ind % e);
-        mask = f << sh;
-        i = ind / e;
-        pd->ptable[i] &= ~mask;
-        pd->ptable[i] |= (((entry_group_t)n) & f) << sh;
-}
-int
-ptableval(PruneData *pd, uint64_t ind)
-{
-        int sh;
-        uint64_t e;
-        entry_group_t m;
-        if (pd->compact) {
-                e  = ENTRIES_PER_GROUP_COMPACT;
-                m  = 3;
-                sh = (ind % e) * 2;
-        } else {
-                e  = ENTRIES_PER_GROUP;
-                m  = 15;
-                sh = (ind % e) * 4;
-        }
-        return (pd->ptable[ind/e] & (m << sh)) >> sh;
-}
-static bool
-read_ptable_file(PruneData *pd)
-{
-        init_env();
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        int i;
-        uint64_t r;
-        strcpy(fname, tabledir);
-        strcat(fname, "/pt_");
-        strcat(fname, pd->coord->name);
-        strcat(fname, "_");
-        strcat(fname, pd->moveset->name);
-        if ((f = fopen(fname, "rb")) == NULL)
-                return false;
-        r = fread(&(pd->base), sizeof(int), 1, f);
-        for (i = 0; i < 16; i++)
-                r += fread(&(pd->count[i]), sizeof(uint64_t), 1, f);
-        r += fread(pd->ptable, sizeof(entry_group_t), ptablesize(pd), f);
-        fclose(f);
-        return r == 17 + ptablesize(pd);
-}
-static bool
-write_ptable_file(PruneData *pd)
-{
-        init_env();
-        FILE *f;
-        char fname[strlen(tabledir)+256];
-        int i;
-        uint64_t w;
-        strcpy(fname, tabledir);
-        strcat(fname, "/pt_");
-        strcat(fname, pd->coord->name);
-        strcat(fname, "_");
-        strcat(fname, pd->moveset->name);
-        if ((f = fopen(fname, "wb")) == NULL)
-                return false;
-        w = fwrite(&(pd->base), sizeof(int), 1, f);
-        for (i = 0; i < 16; i++)
-                w += fwrite(&(pd->count[i]), sizeof(uint64_t), 1, f);
-        w += fwrite(pd->ptable, sizeof(entry_group_t), ptablesize(pd), f);
-        fclose(f);
-        return w == 17 + ptablesize(pd);
-}
diff --git a/src/pruning.h b/src/pruning.h
deleted file mode 100644
index 93ae863..0000000
--- a/src/pruning.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef PRUNING_H
-#define PRUNING_H
-#include "coord.h"
-#include "movesets.h"
-void        free_pd(PruneData *pd);
-PruneData * genptable(PruneData *data, int nthreads);
-void        print_ptable(PruneData *pd);
-uint64_t    ptablesize(PruneData *pd);
-int         ptableval(PruneData *pd, uint64_t ind);
-extern PruneData *active_pd[256];
-#endif
diff --git a/src/shell.c b/src/shell.c
deleted file mode 100644
index 4faa0a8..0000000
--- a/src/shell.c
+++ /dev/null
@@ -1,177 +0,0 @@
-#define SHELL_C
-#include "shell.h"
-static void             cleanwhitespaces(char *line);
-static int              parseline(char *line, char **v);
-bool
-checkfiles()
-{
-        /* TODO: add more checks (other files, use checksum...) */
-        /* How to check for pruning tables with new method? */
-        /* Solution: use list of steps */
-        /*
-        char fname[strlen(tabledir)+100];
-        int i;
-        for (i = 0; all_pd[i] != NULL; i++) {
-                strcpy(fname, tabledir);
-                strcat(fname, "/");
-                strcat(fname, all_pd[i]->filename);
-                if ((f = fopen(fname, "rb")) == NULL)
-                        return false;
-                else
-                        fclose(f);
-        }
-        */
-        return true;
-}
-static void
-cleanwhitespaces(char *line)
-{
-        char *i;
-        for (i = line; *i != 0; i++)
-                if (*i == '\t' || *i == '\n')
-                        *i = ' ';
-}
-/* This function assumes that **v is large enough */
-static int
-parseline(char *line, char **v)
-{
-        char *t;
-        int n = 0;
-        
-        cleanwhitespaces(line);
-        for (t = strtok(line, " "); t != NULL; t = strtok(NULL, " "))
-                strcpy(v[n++], t);
-        return n;
-}
-void
-exec_args(int c, char **v)
-{
-        int i;
-        char line[MAXLINELEN];
-        Command *cmd = NULL;
-        CommandArgs *args;
-        Alg *scramble;
-        for (i = 0; commands[i] != NULL; i++)
-                if (!strcmp(v[0], commands[i]->name))
-                        cmd = commands[i];
-        if (cmd == NULL) {
-                fprintf(stderr, "%s: command not found\n", v[0]);
-                return;
-        }
-        args = cmd->parse_args(c-1, &v[1]);
-        if (!args->success) {
-                fprintf(stderr, "usage: %s\n", cmd->usage);
-                return;
-        }
-        if (args->scrstdin) {
-                while (true) {
-                        if (fgets(line, MAXLINELEN, stdin) == NULL) {
-                                clearerr(stdin);
-                                break;
-                        }
-                        
-                        scramble = new_alg(line);
-                        printf(">>> Line: %s", line);
-                        if (scramble != NULL && scramble->len > 0) {
-                                args->scramble = scramble;
-                                cmd->exec(args);
-                                free_alg(scramble);
-                                args->scramble = NULL;
-                        } 
-                }
-        } else {
-                cmd->exec(args);
-        }
-        free_args(args);
-}
-void
-launch(bool batchmode)
-{
-        int i, shell_argc;
-        char line[MAXLINELEN], **shell_argv;
-        shell_argv = malloc(MAXNTOKENS * sizeof(char *));
-        for (i = 0; i < MAXNTOKENS; i++)
-                shell_argv[i] = malloc((MAXTOKENLEN+1) * sizeof(char));
-        if (!batchmode) {
-                fprintf(stderr, "Welcome to Nissy "VERSION".\n"
-                                "Type \"commands\" for a list of commands.\n");
-        }
-        while (true) {
-                if (!batchmode) {
-                        fprintf(stdout, "nissy-# ");
-                }
-                if (fgets(line, MAXLINELEN, stdin) == NULL)
-                        break;
-                if (batchmode) {
-                        printf(">>>\n"
-                               ">>> Executing command: %s"
-                               ">>>\n", line);
-                }
-                shell_argc = parseline(line, shell_argv);
-                if (shell_argc > 0)
-                        exec_args(shell_argc, shell_argv);
-        }
-        for (i = 0; i < MAXNTOKENS; i++)
-                free(shell_argv[i]);
-        free(shell_argv);
-}
-#ifndef TEST
-int
-main(int argc, char *argv[])
-{
-        char *closing_cmd[1] = { "freemem" };
-        init_env();
-        init_trans();
-        if (!checkfiles()) {
-                fprintf(stderr,
-                        "--- Warning ---\n"
-                        "Some pruning tables are missing or unreadable\n"
-                        "You can generate them with `nissy gen'.\n"
-                        "---------------\n\n"
-                );
-        }
-        if (argc > 1) {
-                if (!strcmp(argv[1], "-b")) {
-                        launch(true);
-                } else {
-                        exec_args(argc-1, &argv[1]);
-                }
-        } else {
-                launch(false);
-        }
-        exec_args(1, closing_cmd);
-        return 0;
-}
-#endif
diff --git a/src/shell.h b/src/shell.h
deleted file mode 100644
index 7e4f785..0000000
--- a/src/shell.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef SHELL_H
-#define SHELL_H
-#include "commands.h"
-#define MAXLINELEN          10000
-#define MAXTOKENLEN         255
-#define MAXNTOKENS          255
-bool        checkfiles();
-void        exec_args(int c, char **v);
-void        launch(bool batchmode);
-#endif
diff --git a/src/solve.c b/src/solve.c
deleted file mode 100644
index 2d0c94d..0000000
--- a/src/solve.c
+++ /dev/null
@@ -1,122 +0,0 @@
-#define SOLVE_C
-#include "solve.h"
-void
-dfs(DfsArg *arg, Solver *solver, Threader *threader)
-{
-        int i;
-        DfsArg newarg;
-        Alg *sol;
-        Move m;
-        if (arg->current_alg->len > arg->d)
-                return;
-        if (solver->is_solved(solver->param, arg->cubedata)) {
-/* TODO: the "all" option should be re-implemented as setting
-validate to null */
-/* TODO: we also have to check if cancel with NISS;
-we can't because we have no access to the s->final field
-this should be done by the step's validator? */
-                sol = solver->validate_solution(solver->param,arg->current_alg);
-                bool accepted = sol != NULL;
-                bool too_short = arg->current_alg->len != arg->d;
-                if (accepted && !too_short) {
-/* TODO: arg->t got lost in refactoring */
-/*                      transform_alg(inverse_trans(arg->t), sol);*/
-                        if (arg->opts->verbose)
-                                print_alg(sol, false);
-                        threader->append_sol(sol, arg->threaddata);
-                }
-                return;
-        }
-        if (arg->current_alg->len == arg->d)
-                return;
-/* TODO: do not alloc */
-        newarg.cubedata = solver->alloc_cubedata(solver->param);
-        for (i = 0; solver->moveset->sorted_moves[i] != NULLMOVE; i++) {
-                m = solver->moveset->sorted_moves[i];
-                if (solver->moveset->can_append(arg->current_alg, m, arg->niss)
-                    && compare_last(arg->current_alg, m, arg->niss) >= 0) {
-                        append_move(arg->current_alg, m, arg->niss);
-                        solver->copy_cubedata(
-                            solver->param, arg->cubedata, newarg.cubedata);
-                        newarg.threaddata  = arg->threaddata;
-                        newarg.opts        = arg->opts;
-                        newarg.d           = arg->d;
-                        newarg.niss        = arg->niss;
-                        newarg.current_alg = arg->current_alg;
-                        if (!solver->move_check_stop(
-                            solver->param, &newarg, threader))
-                                dfs(&newarg, solver, threader);
-                        remove_last_move(arg->current_alg);
-                }
-        }
-        solver->free_cubedata(solver->param, newarg.cubedata);
-        if (arg->opts->can_niss && !arg->niss &&
-            solver->niss_makes_sense(
-            solver->param, arg->cubedata, arg->current_alg)) {
-                solver->invert_cube(solver->param, arg->cubedata);
-                arg->niss = true;
-                dfs(arg, solver, threader);
-        }
-}
-AlgList *
-solve(Cube *cube, SolveOptions *opts, Solver **solver, Threader *threader)
-{
-        int i, d, optimal;
-        bool ready[MAX_SOLVERS], stop, one_ready;
-        DfsArg arg[MAX_SOLVERS];
-        AlgList *sols;
-        one_ready = false;
-        for (i = 0; solver[i] != NULL; i++) {
-                arg[i].cubedata =
-                    solver[i]->prepare_cube(solver[i]->param, cube);
-                arg[i].opts = opts;
-                ready[i] = arg[i].cubedata != NULL;
-                one_ready = one_ready || ready[i];
-        }
-        sols = new_alglist();
-        if (!one_ready) {
-                fprintf(stderr, "Cube not ready for solving\n");
-                return sols;
-        }
-        optimal = opts->max_moves;
-        stop = false;
-        for (d = opts->min_moves; d <= opts->max_moves && !stop; d++) {
-                if (opts->verbose)
-                        fprintf(stderr, "Searching depth %d\n", d);
-                for (i = 0; solver[i] != NULL && !stop; i++) {
-                        if (!ready[i])
-                                continue;
-                        arg[i].d = d;
-                        threader->dispatch(&arg[i], sols, solver[i], threader);
-                        if (sols->len > 0)
-                                optimal = MIN(optimal, d);
-                        stop = sols->len >= opts->max_solutions;
-                }
-                stop = stop ||
-                       (opts->optimal != -1 && d >= opts->optimal + optimal);
-        }
-/* TODO: some cleanup (free cubedata) */
-/* TODO: actually, preparation should be done somewhere else */
-        return sols;
-}
diff --git a/src/solve.h b/src/solve.h
deleted file mode 100644
index 8182887..0000000
--- a/src/solve.h
+++ /dev/null
@@ -1,54 +0,0 @@
-#ifndef SOLVE_H
-#define SOLVE_H
-#include "moves.h"
-#define MAX_SOLVERS 99
-typedef struct dfsarg DfsArg;
-typedef struct threader Threader;
-typedef struct solver Solver;
-/* TODO: add solver and threader in DfsData, remove from dispatch args and similar */
-struct dfsarg {
-        void *                    cubedata;
-        void *                    threaddata;
-        SolveOptions *            opts;
-        int                       d;
-        bool                      niss;
-        Alg *                     current_alg;
-};
-struct threader {
-        void    (*append_sol)(Alg *, void *);
-        void    (*dispatch)(DfsArg *, AlgList *, Solver *, Threader *);
-        int     (*get_nsol)(void *);
-/* TODO: threader should have param, like solver? */
-};
-struct solver {
-        Moveset *  moveset;
-        bool       (*move_check_stop)(void *, DfsArg *, Threader *);
-        Alg *      (*validate_solution)(void *, Alg *);
-        bool       (*niss_makes_sense)(void *, void *, Alg *);
-/* TODO: move param to somewhere where it makes more sense */
-        void *     param;
-/* TODO: the following should be part of a generic cube description */
-/* TODO: remove alloc? */
-/* TODO: revisit apply_move, maybe apply_alg? or both? */
-        void *     (*alloc_cubedata)(void *);
-        void       (*copy_cubedata)(void *, void *, void *);
-        void       (*free_cubedata)(void *, void *);
-        void       (*invert_cube)(void *, void *);
-        bool       (*is_solved)(void *, void *);
-        void       (*apply_move)(void *, void *, Move);
-/* TODO: remove dependence on Cube, preparation should be done before */
-        void *     (*prepare_cube)(void *, Cube *);
-};
-void      dfs(DfsArg *, Solver *, Threader *);
-/* TODO: remove dependence on Cube, preparation should be done before */
-AlgList * solve(Cube *, SolveOptions *, Solver **, Threader *);
-#endif
diff --git a/src/solver_step.c b/src/solver_step.c
deleted file mode 100644
index 52fa347..0000000
--- a/src/solver_step.c
+++ /dev/null
@@ -1,306 +0,0 @@
-#include "solver_step.h"
-typedef struct {
-        Cube *          cube;
-        uint64_t *      val;
-        Trans *         t;
-} CubeData;
-static void             apply_move_cubedata(void *, void *, Move);
-static void             init_indexes(Step *, CubeData *);
-static void *           prepare_cube(void *, Cube *);
-static bool             move_check_stop_eager(void *, DfsArg *, Threader *);
-static bool             move_check_stop_lazy(void *, DfsArg *, Threader *);
-static bool             move_check_stop_nonsol(void *, DfsArg *, Threader *);
-static bool             is_solved_step(void *, void *);
-static Alg *            validate_solution(void *, Alg *);
-static void *           alloc_cubedata(void *);
-static void             copy_cubedata(void *, void *, void *);
-static void             free_cubedata(void *, void *);
-static void             invert_cubedata(void *, void *);
-static bool             niss_makes_sense(void *, void *, Alg *);
-static Solver *         new_stepsolver_nocheckstop(Step *step);
-static void
-apply_move_cubedata(void *param, void *cubedata, Move m)
-{
-        Step *s = (Step *)param;
-        CubeData *data = (CubeData *)cubedata;
-        Trans tt;
-        for (int i = 0; i < s->n_coord; i++) {
-                Move mm = transform_move(data->t[i], m);
-                data->val[i] = move_coord(s->coord[i], mm, data->val[i], &tt);
-                data->t[i]   = transform_trans(tt, data->t[i]);
-        }
-}
-static void
-init_indexes(Step *step, CubeData *data)
-{
-        int i;
-        Cube moved;
-        Trans t, tt;
-        for (i = 0; i < step->n_coord; i++) {
-                t = step->coord_trans[i];
-                copy_cube(data->cube, &moved);
-                apply_trans(t, &moved);
-                data->val[i] = index_coord(step->coord[i], &moved, &tt);
-                data->t[i]   = transform_trans(tt, t);
-        }
-}
-static void *
-prepare_cube(void *param, Cube *cube)
-{
-        int i;
-        Step *s;
-        CubeData *data;
-        s = (Step *)param;
-        for (i = 0; i < s->n_coord; i++) {
-                s->pd[i] = malloc(sizeof(PruneData));
-                s->pd[i]->moveset = s->moveset;
-/* TODO: check if moveset initialization works fine,
-   e.g. if there is a variable to save the initialized status
-   or if it gets initialized multiple times */
-                init_moveset(s->moveset);
-                s->pd[i]->coord   = s->coord[i];
-                gen_coord(s->coord[i]);
-                s->pd[i]->compact = s->pd_compact[i];
-                s->pd[i] = genptable(s->pd[i], 4); /* TODO: threads */
-        }
-        data = alloc_cubedata(param);
-        data->cube = malloc(sizeof(Cube));
-        copy_cube(cube, data->cube);
-        init_indexes(s, data);
-        return data;
-}
-static bool
-move_check_stop_eager(void *param, DfsArg *arg, Threader *threader)
-{
-        int nsol;
-        if (move_check_stop_nonsol(param, arg, threader))
-                return true;
-        nsol = threader->get_nsol(arg->threaddata);
-        return nsol >= arg->opts->max_solutions;
-}
-static bool
-move_check_stop_lazy(void *param, DfsArg *arg, Threader *threader)
-{
-        int nsol;
-        nsol = threader->get_nsol(arg->threaddata);
-        if (nsol >= arg->opts->max_solutions)
-                return true;
-        return move_check_stop_nonsol(param, arg, threader);
-}
-/* TODO: split in 2 (nissable / non-nissable) and only move cube
-        when nissable */
-static bool
-move_check_stop_nonsol(void *param, DfsArg *arg, Threader *threader)
-{
-        int i, goal, bound;
-        Move mm, lastmove;
-        Trans tt = uf;
-        CubeData *data;
-        Step *s;
-        s = (Step *)param;
-        data = (CubeData *)arg->cubedata;
-        bound = 0;
-        goal = arg->d - arg->current_alg->len;
-/* TODO: check if len is 0 */
-        lastmove = arg->current_alg->move[arg->current_alg->len-1];
-        for (i = 0; i < s->n_coord; i++) {
-                mm = transform_move(data->t[i], lastmove);
-                data->val[i] = move_coord(s->coord[i], mm, data->val[i], &tt);
-                data->t[i]   = transform_trans(tt, data->t[i]);
-                bound = MAX(bound, ptableval(s->pd[i], data->val[i]));
-                if (arg->opts->can_niss && !arg->niss)
-                        bound = MIN(1, bound);
-                if (bound > goal) {
-                        return true;
-                }
-        }
-        if (arg->opts->can_niss && !arg->niss)
-                apply_move(lastmove, data->cube);
-        return false;
-}
-static bool
-is_solved_step(void *param, void *cubedata)
-{
-        int i;
-        Step *s;
-        CubeData *data;
-        s = (Step *)param;
-        data = (CubeData *)cubedata;
-        for (i = 0; i < s->n_coord; i++)
-                if (data->val[i] != 0)
-                        return false;
-        return true;
-}
-static Alg *
-validate_solution(void *param, Alg *alg)
-{
-        return ((Step *)param)->is_valid(alg);
-}
-static void *
-alloc_cubedata(void *param)
-{
-        Step *s;
-        CubeData *data;
-        s = (Step *)param;
-        data = malloc(sizeof(CubeData));
-        /* We do not need to allocate a cube */
-        data->val  = malloc(s->n_coord * sizeof(uint64_t));
-        data->t    = malloc(s->n_coord * sizeof(Trans));
-        return data;
-}
-static void
-copy_cubedata(void *param, void *src, void *dst)
-{
-        int i;
-        Step *s;
-        CubeData *newdata, *olddata;
-        s = (Step *)param;
-        olddata = (CubeData *)src;
-        newdata = (CubeData *)dst;
-/* TODO: do not copy if not nissable */
-        newdata->cube = malloc(sizeof(Cube));
-        copy_cube(olddata->cube, newdata->cube);
-        for (i = 0; i < s->n_coord; i++) {
-                newdata->val[i] = olddata->val[i];
-                newdata->t[i]   = olddata->t[i];
-        }
-}
-static void
-free_cubedata(void *param, void *cubedata)
-{
-        CubeData *data;
-        data = (CubeData *)cubedata;
-        free(data->t);
-        free(data->val);
-        free(data->cube);
-        free(data);
-}
-static void
-invert_cubedata(void *param, void *cubedata)
-{
-        Step *s;
-        CubeData *data;
-        s = (Step *)param;
-        data = (CubeData *)cubedata;
-        invert_cube(data->cube);
-        init_indexes(s, data);
-}
-static bool
-niss_makes_sense(void *param, void *cubedata, Alg *alg)
-{
-        Step *s;
-        CubeData *data;
-        s = (Step *)param;
-        data = (CubeData *)cubedata;
-        if (s->final)
-                return false;
-        if (alg->len_normal == 0)
-                return true;
-        Move m = inverse_move(alg->move_normal[alg->len_normal-1]);
-        for (int i = 0; i < s->n_coord; i++) {
-                Move mm = transform_move(data->t[i], m);
-                uint64_t u = move_coord(s->coord[i], mm, 0, NULL);
-                if (ptableval(s->pd[i], u) > 0)
-                        return true;
-        }
-        return false;
-}
-static Solver *
-new_stepsolver_nocheckstop(Step *step)
-{
-        Solver *solver;
-        solver = malloc(sizeof(Solver));
-        solver->moveset = step->moveset;
-        solver->param   = step;
-        solver->apply_move        = apply_move_cubedata;
-        solver->prepare_cube      = prepare_cube;
-        solver->is_solved         = is_solved_step;
-        solver->validate_solution = validate_solution;
-        solver->alloc_cubedata    = alloc_cubedata;
-        solver->copy_cubedata     = copy_cubedata;
-        solver->free_cubedata     = free_cubedata;
-        solver->invert_cube       = invert_cubedata;
-        solver->niss_makes_sense  = niss_makes_sense;
-        return solver;
-}
-Solver *
-new_stepsolver_eager(Step *step)
-{
-        Solver *solver;
-        solver = new_stepsolver_nocheckstop(step);
-        solver->move_check_stop = move_check_stop_eager;
-        return solver;
-}
-Solver *
-new_stepsolver_lazy(Step *step)
-{
-        Solver *solver;
-        solver = new_stepsolver_nocheckstop(step);
-        solver->move_check_stop = move_check_stop_lazy;
-        return solver;
-}
-void
-free_stepsolver(Solver *solver)
-{
-        free(solver);
-}
diff --git a/src/solver_step.h b/src/solver_step.h
deleted file mode 100644
index f68d077..0000000
--- a/src/solver_step.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef SOLVER_STEP_H
-#define SOLVER_STEP_H
-#include "cube.h"
-#include "solve.h"
-#include "steps.h"
-Solver *new_stepsolver_eager(Step *);
-Solver *new_stepsolver_lazy(Step *);
-void    free_stepsolver(Solver *);
-#endif
diff --git a/src/steps.c b/src/steps.c
deleted file mode 100644
index cdba763..0000000
--- a/src/steps.c
+++ /dev/null
@@ -1,177 +0,0 @@
-#define STEPS_C
-#include "steps.h"
-/* TODO: change all checkers to use coordinates! */
-bool
-check_centers(Cube *cube)
-{
-        int i;
-        for (i = 0; i < 6; i++)
-                if (cube->xp[i] != i)
-                        return false;
-        return true;
-}
-bool
-check_coud_HTM(Cube *cube)
-{
-        int i;
-        for (i = 0; i < 8; i++)
-                if (cube->co[i] != 0)
-                        return false;
-        return true;
-}
-bool
-check_coud_URF(Cube *cube)
-{
-        Cube c2, c3;
-        copy_cube(cube, &c2);
-        copy_cube(cube, &c3);
-        apply_move(z, &c2);
-        apply_move(x, &c3);
-        return check_coud_HTM(cube) ||
-               check_coud_HTM(&c2)  ||
-               check_coud_HTM(&c3);
-}
-bool
-check_cp_HTM(Cube *cube)
-{
-        int i;
-        for (i = 0; i < 8; i++)
-                if (cube->cp[i] != i)
-                        return false;
-        return true;
-}
-bool
-check_corners_HTM(Cube *cube)
-{
-        return check_coud_HTM(cube) && check_cp_HTM(cube);
-}
-bool
-check_corners_URF(Cube *cube)
-{
-        Cube c;
-        Trans i;
-        for (i = 0; i < NROTATIONS; i++) {
-                copy_cube(cube, &c);
-                apply_alg(rotation_alg(i), &c);
-                if (check_corners_HTM(&c))
-                        return true;
-        }
-        return false;
-}
-bool
-check_cornershtr(Cube *cube)
-{
-        /* TODO (use coord) */
-        return true;
-}
-bool
-check_eofb(Cube *cube)
-{
-        /* TODO (use coord) */
-        return true;
-}
-bool
-check_drud(Cube *cube)
-{
-        /* TODO (use coord) */
-        return true;
-}
-bool
-check_htr(Cube *cube)
-{
-        /* TODO (check_drud(cube) and coord_htr_drud == 0) */
-        return true;
-}
-Alg *
-validate_singlecw_ending(Alg *alg)
-{
-        int i;
-        bool nor, inv;
-        Alg *ret;
-        Move l2 = NULLMOVE, l1 = NULLMOVE, l2i = NULLMOVE, l1i = NULLMOVE;
-        for (i = 0; i < alg->len; i++) {
-                if (alg->inv[i]) {
-                        l2i = l1i;
-                        l1i = alg->move[i];
-                } else {
-                        l2 = l1;
-                        l1 = alg->move[i];
-                }
-        }
-        nor = l1 ==base_move(l1)  && (!commute(l1, l2) ||l2 ==base_move(l2));
-        inv = l1i==base_move(l1i) && (!commute(l1i,l2i)||l2i==base_move(l2i));
-        if (nor && inv) {
-                ret = new_alg("");
-                copy_alg(alg, ret);
-        } else {
-                ret = NULL;
-        }
-        return ret;
-}
-/* Public functions **********************************************************/
-/*
-void
-compute_ind(Step *s, Cube *cube, Movable *ind)
-{
-        int i;
-        Cube mvd;
-        Trans t, tt;
-        for (i = 0; i < s->n_coord; i++) {
-                t = s->coord_trans[i];
-                copy_cube(cube, &mvd);
-                apply_trans(t, &mvd);
-                ind[i].val = index_coord(s->coord[i], &mvd, &tt);
-                ind[i].t = transform_trans(tt, t);
-        }
-}
-*/
-void
-prepare_cs(ChoiceStep *cs, SolveOptions *opts)
-{
-        int i, j;
-        Step *s;
-        for (i = 0; cs->step[i] != NULL; i++) {
-                s = cs->step[i];
-                for (j = 0; j < s->n_coord; j++) {
-                        s->pd[j] = malloc(sizeof(PruneData));
-                        s->pd[j]->moveset = s->moveset;
-                        s->pd[j]->coord   = s->coord[j];
-                        s->pd[j]->compact = s->pd_compact[j];
-                        s->pd[j] = genptable(s->pd[j], opts->nthreads);
-                }
-        }
-}
diff --git a/src/steps.h b/src/steps.h
deleted file mode 100644
index 206f8b4..0000000
--- a/src/steps.h
+++ /dev/null
@@ -1,244 +0,0 @@
-#ifndef STEPS_H
-#define STEPS_H
-#include "pruning.h"
-#include "movesets.h"
-bool                    check_centers(Cube *cube);
-bool                    check_coud_HTM(Cube *cube);
-bool                    check_coud_URF(Cube *cube);
-bool                    check_cp_HTM(Cube *cube);
-bool                    check_corners_HTM(Cube *cube);
-bool                    check_corners_URF(Cube *cube);
-bool                    check_cornershtr(Cube *cube);
-bool                    check_eofb(Cube *cube);
-bool                    check_drud(Cube *cube);
-bool                    check_htr(Cube *cube);
-/*void                    compute_ind(Step *a, Cube *cube, Movable *ind);*/
-void                    prepare_cs(ChoiceStep *cs, SolveOptions *opts);
-bool                    always_valid(Alg *alg);
-Alg *                   validate_singlecw_ending(Alg *alg);
-#ifndef STEPS_C
-extern char check_centers_msg[100];
-extern char check_eo_msg[100];
-extern char check_dr_msg[100];
-extern char check_htr_msg[100];
-extern char check_drany_msg[100];
-extern Step step_eofb_HTM;
-extern Step step_drud_HTM;
-extern Step step_drfin_drud;
-extern ChoiceStep optimal_HTM;
-extern ChoiceStep eoany_HTM;
-extern ChoiceStep eofb_HTM;
-extern ChoiceStep eorl_HTM;
-extern ChoiceStep eoud_HTM;
-extern ChoiceStep drany_HTM;
-extern ChoiceStep drud_HTM;
-extern ChoiceStep drrl_HTM;
-extern ChoiceStep drfb_HTM;
-extern ChoiceStep dranyfin_DR;
-extern ChoiceStep drudfin_drud;
-extern ChoiceStep drrlfin_drrl;
-extern ChoiceStep drfbfin_drfb;
-extern ChoiceStep *csteps[];
-#else
-char check_centers_msg[100] = "cube must be oriented (centers solved)";
-char check_eo_msg[100]      = "EO must be solved on given axis";
-char check_dr_msg[100]      = "DR must be solved on given axis";
-char check_htr_msg[100]     = "HTR must be solved";
-char check_drany_msg[100]   = "DR must be solved on at least one axis";
-/* Optimal after EO ******************/
-/* TODO: eofin_eo (generic), eofbfin_eofb, eorlfin_eorl, eoudfin_eoud */
-/* EO steps **************************/
-/* TODO: eoany_HTM (generic), eofb_HTM, eorl_HTM, eoud_HTM */
-Step
-step_eofb_HTM = {
-        .ready          = check_centers,
-        .final          = false,
-        .moveset        = &moveset_HTM,
-        .n_coord        = 1,
-        .coord          = {&coord_eofb},
-        .coord_trans    = {uf},
-        .is_valid       = validate_singlecw_ending,
-};
-ChoiceStep
-eoany_HTM = {
-        .shortname = "eo",
-        .name      = "EO on any axis",
-        .step      = {&step_eofb_HTM, &step_eofb_HTM, &step_eofb_HTM, NULL},
-        .t         = {uf, ur, fd},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-eofb_HTM = {
-        .shortname = "eofb",
-        .name      = "EO on F/B",
-        .step      = {&step_eofb_HTM, NULL},
-        .t         = {uf},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-eorl_HTM = {
-        .shortname = "eorl",
-        .name      = "EO on R/L",
-        .step      = {&step_eofb_HTM, NULL},
-        .t         = {ur},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-eoud_HTM = {
-        .shortname = "eoud",
-        .name      = "EO on U/D",
-        .step      = {&step_eofb_HTM, NULL},
-        .t         = {fd},
-        .ready_msg = check_centers_msg,
-};
-/* CO steps **************************/
-/* TODO: coany_HTM (generic), cofb_HTM, corl_HTM, coud_HTM */
-/* TODO: coany_URF (generic), cofb_URF, corl_URF, coud_URF */
-/* Misc corner steps *****************/
-/* TODO: cornershtr_HTM, cornershtr_URF, corners_HTM, corners_URF */
-/* TODO (new): corners_drud */
-/* DR steps **************************/
-/* TODO: dr_eo (generic) */
-/* TODO: dr_eofb (generic), dr_eorl (generic), dr_eoud (generic) */
-/* TODO: drud_eofb, drrl_eofb, drud_eorl, drfb_eorl, drrl_eoud, drfb_eoud */
-Step
-step_drud_HTM = {
-        .ready          = check_centers,
-        .final          = false,
-        .moveset        = &moveset_HTM,
-        .n_coord        = 1,
-        .coord          = {&coord_drud_sym16},
-        .coord_trans    = {uf},
-        .is_valid       = validate_singlecw_ending,
-};
-ChoiceStep
-drany_HTM = {
-        .shortname = "dr",
-        .name      = "DR on any axis",
-        .step      = {&step_drud_HTM, &step_drud_HTM, &step_drud_HTM, NULL},
-        .t         = {uf, rf, fd},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-drud_HTM = {
-        .shortname = "drud",
-        .name      = "DR on U/D",
-        .step      = {&step_drud_HTM, NULL},
-        .t         = {uf},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-drrl_HTM = {
-        .shortname = "drrl",
-        .name      = "DR on R/L",
-        .step      = {&step_drud_HTM, NULL},
-        .t         = {rf},
-        .ready_msg = check_centers_msg,
-};
-ChoiceStep
-drfb_HTM = {
-        .shortname = "drfb",
-        .name      = "DR on F/B",
-        .step      = {&step_drud_HTM, NULL},
-        .t         = {fd},
-        .ready_msg = check_centers_msg,
-};
-/* DR finish steps */
-Step
-step_drfin_drud = {
-        .ready          = check_drud,
-        .final          = true,
-        .moveset        = &moveset_drud,
-        .n_coord        = 1,
-        .coord          = {&coord_drudfin_noE_sym16}, /* TODO: maybe no noE */
-        .coord_trans    = {uf},
-        .is_valid       = NULL,
-};
-ChoiceStep
-dranyfin_DR = {
-        .shortname = "drfin",
-        .name      = "DR finish on any axis without breaking DR",
-        .step      = {&step_drfin_drud, &step_drfin_drud,
-                      &step_drfin_drud, NULL},
-        .t         = {uf, rf, fd},
-        .ready_msg = check_dr_msg,
-};
-ChoiceStep
-drudfin_drud = {
-        .shortname = "drudfin",
-        .name      = "DR finis on U/D without breaking DR",
-        .step      = {&step_drfin_drud, NULL},
-        .t         = {uf},
-        .ready_msg = check_dr_msg,
-};
-ChoiceStep
-drrlfin_drrl = {
-        .shortname = "drrlfin",
-        .name      = "DR finish on R/L without breaking DR",
-        .step      = {&step_drfin_drud, NULL},
-        .t         = {rf},
-        .ready_msg = check_dr_msg,
-};
-ChoiceStep
-drfbfin_drfb = {
-        .shortname = "drfbfin",
-        .name      = "DR finish on F/B without breaking DR",
-        .step      = {&step_drfin_drud, NULL},
-        .t         = {fd},
-        .ready_msg = check_dr_msg,
-};
-/* HTR from DR */
-/* TODO: htr_any (generic), htr_drud, htr_drrl, htr_drfb */
-/* HTR finish */
-/* TODO: htrfin_htr */
-ChoiceStep *csteps[] = {
-/* TODO: re-implement optimal
-        &optimal_HTM,
-*/
-        &eoany_HTM, &eofb_HTM, &eorl_HTM, &eoud_HTM,
-        &drany_HTM, &drud_HTM, &drrl_HTM, &drfb_HTM,
-        &dranyfin_DR, &drudfin_drud, &drrlfin_drrl, &drfbfin_drfb,
-NULL
-/* TODO:
-        &optimal_light_HTM,
-        &eofin_eo, &eofbfin_eofb, &eorlfin_eorl, &eoudfin_eoud,
-        &coany_HTM, &coud_HTM, &corl_HTM, &cofb_HTM,
-        &coany_URF, &coud_URF, &corl_URF, &cofb_URF,
-        &dr_eo, &dr_eofb, &dr_eorl, &dr_eoud,
-        &drud_eofb, &drrl_eofb,
-        &drud_eorl, &drfb_eorl,
-        &drfb_eoud, &drrl_eoud,
-        &htr_any, &htr_drud, &htr_drrl, &htr_drfb,
-        &htrfin_htr,
-        &cornershtr_HTM, &cornershtr_URF, &corners_HTM, &corners_URF,
-        NULL
-*/
-};
-#endif
-#endif
diff --git a/src/threader_eager.c b/src/threader_eager.c
deleted file mode 100644
index 261b995..0000000
--- a/src/threader_eager.c
+++ /dev/null
@@ -1,163 +0,0 @@
-#include <pthread.h>
-#include "threader_eager.h"
-typedef struct {
-        AlgList *          sols;
-        pthread_mutex_t *  sols_mutex;
-} ThreadData;
-typedef struct {
-        DfsArg *           arg;
-        Solver *           solver;
-        Threader *         threader;
-        AlgList *          starts;
-        AlgListNode **      node;
-        pthread_mutex_t *  start_mutex;
-} ThreadInitData;
-static void             append_sol(Alg *, void *);
-static void *           instance_thread(void *);
-static void             dispatch(DfsArg *, AlgList *, Solver *, Threader *);
-static AlgList *        possible_starts(DfsArg *, Solver *);
-static int              get_nsol(void *);
-Threader threader_eager = {
-        .append_sol      = append_sol,
-        .dispatch        = dispatch,
-        .get_nsol        = get_nsol,
-};
-static void
-append_sol(Alg *alg, void *threaddata)
-{
-        ThreadData *td = (ThreadData *)threaddata;
-        pthread_mutex_lock(td->sols_mutex);
-        append_alg(td->sols, alg);
-        pthread_mutex_unlock(td->sols_mutex);
-}
-static AlgList *
-possible_starts(DfsArg *arg, Solver *solver)
-{
-        AlgList *ret = new_alglist();
-        if (solver->is_solved(solver->param, arg->cubedata)) {
-                if (arg->opts->min_moves == 0 && arg->d == 0)
-                        append_sol(new_alg(""), arg->threaddata);
-                return ret;
-        }
-        for (int i = 0; solver->moveset->sorted_moves[i] != NULLMOVE; i++) {
-                Move m = solver->moveset->sorted_moves[i];
-                Alg *alg = new_alg("");
-                append_move(alg, m, false);
-                append_alg(ret, alg);
-                free_alg(alg);
-/* TODO: check if step not final */
-                if (arg->opts->can_niss) {
-                        alg = new_alg("");
-                        append_move(alg, m, true);
-                        append_alg(ret, alg);
-                        free_alg(alg);
-                }
-        }
-        return ret;
-}
-static void *
-instance_thread(void *arg)
-{
-        ThreadInitData *tid = (ThreadInitData *)arg;
-        while (true) {
-                pthread_mutex_lock(tid->start_mutex);
-                AlgListNode *node = *(tid->node);
-                if (node == NULL) {
-                        pthread_mutex_unlock(tid->start_mutex);
-                        break;
-                }
-                *(tid->node) = (*(tid->node))->next;
-                pthread_mutex_unlock(tid->start_mutex);
-/* TODO: adjust for longer (arbitrarily long?) starting sequences */
-                void *data = tid->solver->alloc_cubedata(tid->solver->param);
-                tid->solver->copy_cubedata(
-                        tid->solver->param, tid->arg->cubedata, data);
-                bool inv = node->alg->inv[node->alg->len-1];
-                if (inv)
-                        tid->solver->invert_cube(
-                                tid->solver->param, data);
-                tid->solver->apply_move(
-                        tid->solver->param, data, node->alg->move[0]);
-                DfsArg newarg;
-                newarg.cubedata    = data;
-                newarg.threaddata  = tid->arg->threaddata;
-                newarg.opts        = tid->arg->opts;
-                newarg.d           = tid->arg->d;
-                newarg.niss        = inv;
-                newarg.current_alg = new_alg("");
-                copy_alg(node->alg, newarg.current_alg);
-                dfs(&newarg, tid->solver, tid->threader);
-                tid->solver->free_cubedata(tid->solver->param, data);
-                free_alg(newarg.current_alg);
-        }
-        return NULL;
-}
-static void
-dispatch(DfsArg *arg, AlgList *sols, Solver *solver, Threader *threader)
-{
-        int nthreads = arg->opts->nthreads;
-        ThreadInitData tid[nthreads];
-        pthread_t t[nthreads];
-        pthread_mutex_t *sols_mutex = malloc(sizeof(pthread_mutex_t));
-        pthread_mutex_init(sols_mutex, NULL);
-        arg->threaddata = malloc(sizeof(ThreadData));
-        ThreadData *td  = (ThreadData *)arg->threaddata;
-        td->sols        = sols;
-        td->sols_mutex  = sols_mutex;
-        AlgList *starts = possible_starts(arg, solver);
-        AlgListNode *node = starts->first;
-        pthread_mutex_t *start_mutex = malloc(sizeof(pthread_mutex_t));
-        pthread_mutex_init(start_mutex, NULL);
-        for (int i = 0; i < nthreads; i++) {
-                tid[i].arg         = arg;
-                tid[i].solver      = solver;
-                tid[i].threader    = threader;
-                tid[i].starts      = starts;
-                tid[i].node        = &node;
-                tid[i].start_mutex = start_mutex;
-                pthread_create(&t[i], NULL, instance_thread, &tid[i]);
-        }
-        for (int i = 0; i < nthreads; i++)
-                pthread_join(t[i], NULL);
-        free(td);
-        free(sols_mutex);
-        free_alglist(starts);
-        free(start_mutex);
-}
-static int
-get_nsol(void *threaddata)
-{
-        ThreadData *td = (ThreadData *)threaddata;
-        pthread_mutex_lock(td->sols_mutex);
-        int n = td->sols->len;
-        pthread_mutex_unlock(td->sols_mutex);
-        return n;
-}
diff --git a/src/threader_eager.h b/src/threader_eager.h
deleted file mode 100644
index e39b27f..0000000
--- a/src/threader_eager.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef THREADER_EAGER_H
-#define THREADER_EAGER_H
-#include "solve.h"
-extern Threader threader_eager;
-#endif
diff --git a/src/threader_single.c b/src/threader_single.c
deleted file mode 100644
index 232835d..0000000
--- a/src/threader_single.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include "threader_single.h"
-static void             append_sol(Alg *, void *);
-static void             dispatch(DfsArg *, AlgList *, Solver *, Threader *);
-static int              get_nsol(void *);
-Threader threader_single = {
-        .append_sol      = append_sol,
-        .dispatch        = dispatch,
-        .get_nsol        = get_nsol,
-};
-static void
-append_sol(Alg *alg, void *threaddata)
-{
-        append_alg((AlgList *)threaddata, alg);
-}
-static void
-dispatch(DfsArg *arg, AlgList *sols, Solver *solver, Threader *threader)
-{
-        arg->threaddata  = sols;
-        arg->niss        = false;
-        arg->current_alg = new_alg("");
-        dfs(arg, solver, threader);
-        free_alg(arg->current_alg);
-}
-static int
-get_nsol(void *threaddata)
-{
-        return ((AlgList *)threaddata)->len;
-}
diff --git a/src/threader_single.h b/src/threader_single.h
deleted file mode 100644
index 2c0bfab..0000000
--- a/src/threader_single.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef THREADER_SINGLE_H
-#define THREADER_SINGLE_H
-#include "solve.h"
-extern Threader threader_single;
-#endif
diff --git a/src/trans.c b/src/trans.c
deleted file mode 100644
index 898c2be..0000000
--- a/src/trans.c
+++ /dev/null
@@ -1,190 +0,0 @@
-#define TRANS_C
-#include "trans.h"
-/* Local functions ***********************************************************/
-/* Tables and other data *****************************************************/
-static Cube mirror_cube = {
-.ep = { [UF] = UF, [UL] = UR, [UB] = UB, [UR] = UL,
-        [DF] = DF, [DL] = DR, [DB] = DB, [DR] = DL,
-        [FR] = FL, [FL] = FR, [BL] = BR, [BR] = BL },
-.cp = { [UFR] = UFL, [UFL] = UFR, [UBL] = UBR, [UBR] = UBL,
-        [DFR] = DFL, [DFL] = DFR, [DBL] = DBR, [DBR] = DBL },
-.xp = { [U_center] = U_center, [D_center] = D_center,
-        [R_center] = L_center, [L_center] = R_center,
-        [F_center] = F_center, [B_center] = B_center }
-};
-static char rotation_alg_string[100][NROTATIONS] = {
-        [uf] = "",     [ur] = "y",    [ub] = "y2",    [ul] = "y3",
-        [df] = "z2",   [dr] = "y z2", [db] = "x2",    [dl] = "y3 z2",
-        [rf] = "z3",   [rd] = "z3 y", [rb] = "z3 y2", [ru] = "z3 y3",
-        [lf] = "z",    [ld] = "z y3", [lb] = "z y2",  [lu] = "z y",
-        [fu] = "x y2", [fr] = "x y",  [fd] = "x",     [fl] = "x y3",
-        [bu] = "x3",   [br] = "x3 y", [bd] = "x3 y2", [bl] = "x3 y3",
-};
-Alg  *rotation_alg_arr[NROTATIONS];
-Move  moves_ttable[NTRANS][NMOVES];
-Trans trans_ttable[NTRANS][NTRANS];
-Trans trans_itable[NTRANS];
-/* Public functions **********************************************************/
-void
-apply_trans(Trans t, Cube *cube)
-{
-        Cube aux;
-        Alg *inv;
-        int i;
-        inv = inverse_alg(rotation_alg(t % NROTATIONS));
-        copy_cube(cube, &aux);
-        make_solved(cube);
-        if (t >= NROTATIONS)
-                compose(&mirror_cube, cube);
-        apply_alg(inv, cube);
-        compose(&aux, cube);
-        apply_alg(rotation_alg(t % NROTATIONS), cube);
-        if (t >= NROTATIONS) {
-                compose(&mirror_cube, cube);
-                for (i = 0; i < 8; i++)
-                        cube->co[i] = (3 - cube->co[i]) % 3;
-        }
-        free_alg(inv);
-}
-/*
-Trans
-inverse_trans(Trans t)
-{
-        static Trans inverse_trans_aux[NTRANS] = {
-                [uf] = uf, [ur] = ul, [ul] = ur, [ub] = ub,
-                [df] = df, [dr] = dr, [dl] = dl, [db] = db,
-                [rf] = lf, [rd] = bl, [rb] = rb, [ru] = fr,
-                [lf] = rf, [ld] = br, [lb] = lb, [lu] = fl,
-                [fu] = fu, [fr] = ru, [fd] = bu, [fl] = lu,
-                [bu] = fd, [br] = ld, [bd] = bd, [bl] = rd,
-                [uf_mirror] = uf_mirror, [ur_mirror] = ur_mirror,
-                [ul_mirror] = ul_mirror, [ub_mirror] = ub_mirror,
-                [df_mirror] = df_mirror, [dr_mirror] = dl_mirror,
-                [dl_mirror] = dr_mirror, [db_mirror] = db_mirror,
-                [rf_mirror] = rf_mirror, [rd_mirror] = br_mirror,
-                [rb_mirror] = lb_mirror, [ru_mirror] = fl_mirror,
-                [lf_mirror] = lf_mirror, [ld_mirror] = bl_mirror,
-                [lb_mirror] = rb_mirror, [lu_mirror] = fr_mirror,
-                [fu_mirror] = fu_mirror, [fr_mirror] = lu_mirror,
-                [fd_mirror] = bu_mirror, [fl_mirror] = ru_mirror,
-                [bu_mirror] = fd_mirror, [br_mirror] = rd_mirror,
-                [bd_mirror] = bd_mirror, [bl_mirror] = ld_mirror
-        };
-        return inverse_trans_aux[t];
-}
-*/
-Trans
-inverse_trans(Trans t)
-{
-        return trans_itable[t];
-}
-Alg *
-rotation_alg(Trans i)
-{
-        return rotation_alg_arr[i % NROTATIONS];
-}
-void
-transform_alg(Trans t, Alg *alg)
-{
-        int i;
-        for (i = 0; i < alg->len; i++)
-                alg->move[i] = transform_move(t, alg->move[i]);
-}
-Move
-transform_move(Trans t, Move m)
-{
-        return moves_ttable[t][m];
-}
-Trans
-transform_trans(Trans t, Trans m)
-{
-        return trans_ttable[t][m];
-}
-void
-init_trans() {
-        static bool initialized = false;
-        if (initialized)
-                return;
-        initialized = true;
-        int i;
-        Alg *nonsym_alg, *nonsym_inv;
-        Cube aux, cube;
-        Move mi, move;
-        Trans t, u, v;
-        init_moves();
-        for (i = 0; i < NROTATIONS; i++)
-                rotation_alg_arr[i] = new_alg(rotation_alg_string[i]);
-        for (t = 0; t < NTRANS; t++) {
-                for (mi = 0; mi < NMOVES; mi++) {
-                        make_solved(&aux);
-                        apply_move(mi, &aux);
-                        apply_trans(t, &aux);
-                        for (move = 0; move < NMOVES; move++) {
-                                copy_cube(&aux, &cube);
-                                apply_move(inverse_move(move), &cube);
-                                if (is_solved(&cube)) {
-                                        moves_ttable[t][mi] = move;
-                                        break;
-                                }
-                        }
-                }
-        }
-        nonsym_alg = new_alg("R' U' F");
-        nonsym_inv = inverse_alg(nonsym_alg);
-                
-        for (t = 0; t < NTRANS; t++) {
-                for (u = 0; u < NTRANS; u++) {
-                        make_solved(&aux);
-                        apply_alg(nonsym_alg, &aux);
-                        apply_trans(u, &aux);
-                        apply_trans(t, &aux);
-                        for (v = 0; v < NTRANS; v++) {
-                                copy_cube(&aux, &cube);
-                                apply_trans(v, &cube);
-                                apply_alg(nonsym_inv, &cube);
-                                if (is_solved(&cube)) {
-                                        /* This is the inverse of the correct
-                                           value, it will be inverted later */
-                                        trans_ttable[t][u] = v;
-                                        if (v == uf)
-                                                trans_itable[t] = u;
-                                        break;
-                                }
-                        }
-                }
-        }
-        for (t = 0; t < NTRANS; t++)
-                for (u = 0; u < NTRANS; u++)
-                        trans_ttable[t][u] = trans_itable[trans_ttable[t][u]];
-        free_alg(nonsym_alg);
-        free_alg(nonsym_inv);
-}
diff --git a/src/trans.h b/src/trans.h
deleted file mode 100644
index 0cc8cef..0000000
--- a/src/trans.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#ifndef TRANS_H
-#define TRANS_H
-#include "moves.h"
-void        apply_trans(Trans t, Cube *cube);
-Trans       inverse_trans(Trans t);
-Alg *       rotation_alg(Trans i);
-void        transform_alg(Trans t, Alg *alg);
-Move        transform_move(Trans t, Move m);
-Trans       transform_trans(Trans t, Trans m);
-void        init_trans();
-#ifndef TRANS_C
-extern TransGroup tgrp_udfix;
-#else
-TransGroup
-tgrp_udfix = {
-        .n = 16,
-        .t = { uf, ur, ub, ul,
-               df, dr, db, dl,
-               uf_mirror, ur_mirror, ub_mirror, ul_mirror,
-               df_mirror, dr_mirror, db_mirror, dl_mirror },
-};
-#endif
-#endif
diff --git a/src/utils.c b/src/utils.c
deleted file mode 100644
index cbf951e..0000000
--- a/src/utils.c
+++ /dev/null
@@ -1,290 +0,0 @@
-#define UTILS_C
-#include "utils.h"
-void
-apply_permutation(int *perm, int *set, int n)
-{
-        int *aux = malloc(n * sizeof(int));
-        int i;
-        if (!is_perm(perm, n))
-                return;
-                
-        for (i = 0; i < n; i++)
-                aux[i] = set[perm[i]];
-        memcpy(set, aux, n * sizeof(int));
-        free(aux);
-}
-int
-binomial(int n, int k)
-{
-        if (n < 0 || k < 0 || k > n)
-                return 0;
-        return factorial(n) / (factorial(k) * factorial(n-k));
-}
-int
-digit_array_to_int(int *a, int n, int b)
-{
-        int i, ret = 0, p = 1;
-        for (i = 0; i < n; i++, p *= b)
-                ret += a[i] * p;
-        return ret;
-}
-int
-factorial(int n)
-{
-        int i, ret = 1;
-        if (n < 0)
-                return 0;
-        for (i = 1; i <= n; i++)
-                ret *= i;
-        return ret;
-}
-void
-index_to_perm(int p, int n, int *r)
-{
-        int *a = malloc(n * sizeof(int));
-        int i, j, c;
-        for (i = 0; i < n; i++)
-                a[i] = 0;
-        if (p < 0 || p >= factorial(n))
-                for (i = 0; i < n; i++)
-                        r[i] = -1;
-        for (i = 0; i < n; i++) {
-                c = 0;
-                j = 0;
-                while (c <= p / factorial(n-i-1))
-                        c += a[j++] ? 0 : 1;
-                r[i] = j-1;
-                a[j-1] = 1;
-                p %= factorial(n-i-1);
-        }
-        free(a);
-}
-void
-index_to_subset(int s, int n, int k, int *r)
-{
-        int i, j, v;
-        if (s < 0 || s >= binomial(n, k)) {
-                for (i = 0; i < n; i++)
-                        r[i] = -1;
-                return;
-        }
-        for (i = 0; i < n; i++) {
-                if (k == n-i) {
-                        for (j = i; j < n; j++)
-                                r[j] = 1;
-                        return;
-                }
-                if (k == 0) {
-                        for (j = i; j < n; j++)
-                                r[j] = 0;
-                        return;
-                }
-                v = binomial(n-i-1, k);
-                if (s >= v) {
-                        r[i] = 1;
-                        k--;
-                        s -= v;
-                } else {
-                        r[i] = 0;
-                }
-        }
-}
-void
-int_to_digit_array(int a, int b, int n, int *r)
-{
-        int i;
-        if (b <= 1)
-                for (i = 0; i < n; i++)
-                        r[i] = 0;
-        else
-                for (i = 0; i < n; i++, a /= b)
-                        r[i] = a % b;
-}
-void
-int_to_sum_zero_array(int x, int b, int n, int *a)
-{
-        int i, s = 0;
-        if (b <= 1) {
-                for (i = 0; i < n; i++)
-                    a[i] = 0;
-        } else {
-                int_to_digit_array(x, b, n-1, a);
-                for (i = 0; i < n - 1; i++)
-                    s = (s + a[i]) % b;
-                a[n-1] = (b - s) % b;
-        }
-}
-int
-invert_digits(int a, int b, int n)
-{
-        int i, ret, *r = malloc(n * sizeof(int));
-        int_to_digit_array(a, b, n, r);
-        for (i = 0; i < n; i++)
-                r[i] = (b-r[i]) % b;
-        ret = digit_array_to_int(r, n, b);
-        free(r);
-        return ret;
-}
-bool
-is_perm(int *a, int n)
-{
-        int *aux = malloc(n * sizeof(int));
-        int i;
-        bool ret = true;
-        for (i = 0; i < n; i++)
-                aux[i] = 0;
-        
-        for (i = 0; i < n; i++) {
-                if (a[i] < 0 || a[i] >= n)
-                        ret = false;
-                else
-                        aux[a[i]] = 1;
-        }
-        for (i = 0; i < n; i++)
-                if (!aux[i])
-                        ret = false;
-        free(aux);
-        return ret;
-}
-bool
-is_subset(int *a, int n, int k)
-{
-        int i, sum = 0;
-        for (i = 0; i < n; i++)
-                sum += a[i] ? 1 : 0;
-        return sum == k;
-}
-int
-perm_sign(int *a, int n)
-{
-        int i, j, ret = 0;
-        if (!is_perm(a, n))
-                return -1;
-        for (i = 0; i < n; i++)
-                for (j = i+1; j < n; j++)
-                        ret += (a[i] > a[j]) ? 1 : 0;
-        return ret % 2;
-}
-int
-perm_to_index(int *a, int n)
-{
-        int i, j, c, ret = 0;
-        if (!is_perm(a, n))
-                return factorial(n);
-        for (i = 0; i < n; i++) {
-                c = 0;
-                for (j = i+1; j < n; j++)
-                        c += (a[i] > a[j]) ? 1 : 0;
-                ret += factorial(n-i-1) * c;
-        }
-        return ret;
-}
-int
-powint(int a, int b)
-{
-        if (b < 0)
-                return 0;
-        if (b == 0)
-                return 1;
-        if (b % 2)
-                return a * powint(a, b-1);
-        else
-                return powint(a*a, b/2);
-}
-int 
-subset_to_index(int *a, int n, int k)
-{
-        int i, ret = 0;
-        if (!is_subset(a, n, k))
-                return binomial(n, k);
-        for (i = 0; i < n; i++) {
-                if (k == n-i)
-                        return ret;
-                if (a[i]) {
-                        ret += binomial(n-i-1, k);
-                        k--;
-                }
-        }
-        return ret;
-}
-void
-sum_arrays_mod(int *src, int *dst, int n, int m)
-{
-        int i;
-        for (i = 0; i < n; i++)
-                dst[i] = (m <= 0) ? 0 : (src[i] + dst[i]) % m;
-}
-void
-swap(int *a, int *b)
-{
-        int aux;
-        aux = *a;
-        *a  = *b;
-        *b  = aux;
-}
-void
-swapu64(uint64_t *a, uint64_t *b)
-{
-        uint64_t aux;
-        aux = *a;
-        *a  = *b;
-        *b  = aux;
-}
diff --git a/src/utils.h b/src/utils.h
deleted file mode 100644
index 9ba228d..0000000
--- a/src/utils.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef UTILS_H
-#define UTILS_H
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#define POW2TO6             64ULL
-#define POW2TO11            2048ULL
-#define POW2TO12            4096ULL
-#define POW3TO7             2187ULL
-#define POW3TO8             6561ULL
-#define FACTORIAL4          24ULL
-#define FACTORIAL6          720ULL
-#define FACTORIAL7          5040ULL
-#define FACTORIAL8          40320ULL
-#define FACTORIAL12         479001600ULL
-#define BINOM12ON4          495ULL
-#define BINOM8ON4           70ULL
-#define MIN(a,b)            (((a) < (b)) ? (a) : (b))
-#define MAX(a,b)            (((a) > (b)) ? (a) : (b))
-void        apply_permutation(int *perm, int *set, int n);
-int         binomial(int n, int k);
-int         digit_array_to_int(int *a, int n, int b);
-int         factorial(int n);
-void        index_to_perm(int p, int n, int *r);
-void        index_to_subset(int s, int n, int k, int *r);
-void        int_to_digit_array(int a, int b, int n, int *r);
-void        int_to_sum_zero_array(int x, int b, int n, int *a);
-int         invert_digits(int a, int b, int n);
-bool        is_perm(int *a, int n);
-bool        is_subset(int *a, int n, int k);
-int         perm_sign(int *a, int n);
-int         perm_to_index(int *a, int n);
-int         powint(int a, int b);
-int         subset_to_index(int *a, int n, int k);
-void        sum_arrays_mod(int *src, int *dst, int n, int m);
-void        swap(int *a, int *b);
-void        swapu64(uint64_t *a, uint64_t *b);
-#endif
diff --git a/tests/alg_tests.c b/tests/alg_tests.c
deleted file mode 100644
index 9ac1595..0000000
--- a/tests/alg_tests.c
+++ /dev/null
@@ -1,266 +0,0 @@
-#include "alg_tests.h"
-bool testmethod_append_move(void *);
-bool testmethod_new_alg(void *);
-/*
-bool testmethod_compose_alg(void *);
-bool testmethod_inverse_alg(void *);
-bool testmethod_on_inverse(void *);
-bool testmethod_unniss(void *);
-*/
-typedef struct {
-        Move *move;
-        bool *inv;
-        int len;
-        Move m;
-        bool inverse;
-} append_move_t;
-Move m_app1[] = {F, x, D3};
-bool i_app1[] = {true, false, false};
-append_move_t append_move_case1 = {
-        .move = m_app1,
-        .inv = i_app1,
-        .len = 3,
-        .m = L3,
-        .inverse = false,
-};
-Move m_app2[] = {S, U, x2, M2};
-bool i_app2[] = {true, false, true, true};
-append_move_t append_move_case2 = {
-        .move = m_app2,
-        .inv = i_app2,
-        .len = 4,
-        .m = R,
-        .inverse = true,
-};
-Move m_app3[] = {U, U, U, U, U};
-bool i_app3[] = {false, false, false, false, false};
-append_move_t append_move_case3 = {
-        .move = m_app3,
-        .inv = i_app3,
-        .len = 5,
-        .m = U,
-        .inverse = false,
-};
-append_move_t *append_move_cases[] = {
-        &append_move_case1,
-        &append_move_case2,
-        &append_move_case3,
-};
-Test test_append_move = {
-        .name  = "Appending a move to and alg",
-        .t     = testmethod_append_move,
-        .cases = (void **)append_move_cases,
-};
-typedef struct {
-        char *str;
-        Move *move;
-        bool *inv;
-        int len;
-        Move *move_normal;
-        int len_normal;
-        Move *move_inverse;
-        int len_inverse;
-} new_alg_t;
-/* Alg F U B' (L3 D) x M (S) y3 */
-Move m_new1[] = {F, U, B3, L3, D, x, M, S, y3};
-Move mn_new1[] = {F, U, B3, x, M, y3};
-Move mi_new1[] = {L3, D, S};
-bool i_new1[] = {false, false, false, true, true, false, false, true, false};
-new_alg_t new_alg_case1 = {
-        .str = "F U B' (L3 D) x M (S) y3",
-        .move = m_new1,
-        .inv = i_new1,
-        .len = 9,
-        .move_normal = mn_new1,
-        .len_normal = 6,
-        .move_inverse = mi_new1,
-        .len_inverse = 3,
-};
-new_alg_t *new_alg_cases[] = {&new_alg_case1};
-Test test_new_alg = {
-        .name  = "Initializing an alg from a string",
-        .t     = testmethod_new_alg,
-        .cases = (void **)new_alg_cases,
-};
-Test *alg_all_tests[] = {
-        &test_append_move,
-        &test_new_alg,
-/*
-        &test_append_alg,
-        &test_compose_alg,
-        &test_inverse_alg,
-        &test_on_inverse,
-        &test_unniss,
-*/
-        NULL
-};
-TestSuite alg_suite = {
-        .setup    = NULL,
-        .tests    = alg_all_tests,
-        .teardown = NULL,
-};
-TestSuite *alg_suites[] = {
-        &alg_suite,
-        NULL
-};
-bool
-testmethod_append_move(void *a)
-{
-        append_move_t *b = (append_move_t *)a;
-        int li, ln;
-        Alg *alg;
-        /* Small to test reallocation */
-        alg = malloc(sizeof(Alg));
-        alg->allocated    = 5;
-        alg->move         = malloc(alg->allocated * sizeof(Move));
-        alg->inv          = malloc(alg->allocated * sizeof(bool));
-        alg->len          = b->len;
-        memcpy(alg->move, b->move, alg->len * sizeof(Move));
-        memcpy(alg->inv,  b->inv,  alg->len * sizeof(bool));
-        alg->move_normal  = malloc(alg->allocated * sizeof(Move));
-        alg->move_inverse = malloc(alg->allocated * sizeof(Move));
-        li = ln = 0;
-        for (int i = 0; i < alg->len; i++) {
-                if (alg->inv[i])
-                        alg->move_inverse[li++] = alg->move[i];
-                else
-                        alg->move_normal[ln++] = alg->move[i];
-        }
-        alg->len_inverse = li;
-        alg->len_normal = ln;
-        append_move(alg, b->m, b->inverse);
-        if (alg->len != b->len + 1) {
-                printf("Alg has wrong len (%d instead of %d)\n",
-                        alg->len, b->len + 1);
-                goto append_move_fail;
-        }
-        if (alg->move[alg->len-1] != b->m) {
-                printf("Wrong last move (%s instead of %s)\n",
-                        move_string(alg->move[alg->len-1]),
-                        move_string(b->m));
-                goto append_move_fail;
-        }
-        if (alg->inv[alg->len-1] != b->inverse) {
-                printf("Wrong inverse flag for last move "
-                        "(%s instead of %s)\n",
-                        b->inverse ? "normal" : "inverse",
-                        b->inverse ? "inverse" : "normal");
-                goto append_move_fail;
-        }
-        if (b->inverse) {
-                if (alg->len_inverse != li + 1 ||
-                    alg->len_normal  != ln) {
-                        printf("%d moves on normal (should be %d)"
-                               " and %d on inverse (should be %d)\n",
-                               alg->len_normal, ln,
-                               alg->len_inverse, li + 1);
-                        goto append_move_fail;
-                }
-                if (alg->move_inverse[alg->len_inverse-1] != b->m) {
-                        printf("Wrong move on inverse (%s instead of %s)\n",
-                                move_string(alg->move_inverse[alg->len-1]),
-                                move_string(b->m));
-                        goto append_move_fail;
-                }
-        } else {
-                if (alg->len_inverse != li ||
-                    alg->len_normal  != ln + 1) {
-                        printf("%d moves on normal (should be %d)"
-                               " and %d on inverse (should be %d)\n",
-                               alg->len_normal, ln,
-                               alg->len_inverse, li + 1);
-                        goto append_move_fail;
-                }
-                if (alg->move_normal[alg->len_normal-1] != b->m) {
-                        printf("Wrong move on normal (%s instead of %s)\n",
-                                move_string(alg->move_normal[alg->len-1]),
-                                move_string(b->m));
-                        goto append_move_fail;
-                }
-        }
-        free(alg);
-        return true;
-append_move_fail:
-        free(alg);
-        return false;
-}
-bool
-testmethod_new_alg(void *a)
-{
-        new_alg_t *b = (new_alg_t *)a;
-        Alg *alg = new_alg(b->str);
-        if (alg->len != b->len) {
-                printf("Algs have different length (%d instead of %d)\n",
-                        alg->len, b->len);
-                goto new_alg_fail;
-        }
-        for (int i = 0; i < alg->len; i++) {
-                if (alg->move[i] != b->move[i] || alg->inv[i] != b->inv[i]) {
-                        printf("Algs differ on move %d\n", i);
-                        printf("Expected: %s\nActual:   ", b->str);
-                        print_alg(alg, false);
-                        goto new_alg_fail;
-                }
-        }
-        if (alg->len_normal != b->len_normal) {
-                printf("Algs have different number of moves on normal"
-                        " (%d instead of %d)\n",
-                        alg->len_normal, b->len_normal);
-                goto new_alg_fail;
-        }
-        for (int i = 0; i < alg->len_normal; i++) {
-                if (alg->move_normal[i] != b->move_normal[i]) {
-                        printf("Algs have different move %d on normal"
-                                " (%s instead of %s)\n", i,
-                                move_string(alg->move_normal[i]),
-                                move_string(b->move_normal[i]));
-                        goto new_alg_fail;
-                }
-        }
-        if (alg->len_inverse != b->len_inverse) {
-                printf("Algs have different number of moves on inverse"
-                        " (%d instead of %d)\n",
-                        alg->len_inverse, b->len_inverse);
-                goto new_alg_fail;
-        }
-        for (int i = 0; i < alg->len_inverse; i++) {
-                if (alg->move_inverse[i] != b->move_inverse[i]) {
-                        printf("Algs have different move %d on inverse:\n"
-                                " (%s instead of %s)\n", i,
-                                move_string(alg->move_inverse[i]),
-                                move_string(b->move_inverse[i]));
-                        goto new_alg_fail;
-                }
-        }
-        free(alg);
-        return true;
-new_alg_fail:
-        free(alg);
-        return false;
-}
diff --git a/tests/alg_tests.h b/tests/alg_tests.h
deleted file mode 100644
index a24b51f..0000000
--- a/tests/alg_tests.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef ALG_TESTS_H
-#define ALG_TESTS_H
-#include "../src/alg.h"
-#include "test_common.h"
-extern Test test_append_move;
-extern Test test_new_alg;
-/*
-extern Test remove_last_move;
-extern Test test_compose_alg;
-extern Test test_inverse_alg;
-extern Test test_on_inverse;
-extern Test test_unniss;
-*/
-extern TestSuite alg_suite;
-extern TestSuite *alg_suites[];
-#endif
diff --git a/tests/coord_tests.c b/tests/coord_tests.c
deleted file mode 100644
index 8d6b6d3..0000000
--- a/tests/coord_tests.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include "coord_tests.h"
-bool testmethod_indexes_consistent(void *);
-Test test_indexes_consistent = {
-        .name  = "Consitency of index and anti-index",
-        .t     = testmethod_indexes_consistent,
-        .cases = (void **)all_coordinates,
-};
-Test *coord_pre_init[] = {
-        &test_indexes_consistent,
-        NULL
-};
-TestSuite coord_pre_init_suite = {
-        .setup    = NULL,
-        .tests    = coord_pre_init,
-        .teardown = NULL,
-};
-TestSuite *coord_suites[] = {
-        &coord_pre_init_suite,
-        NULL
-};
-bool
-testmethod_indexes_consistent(void *a)
-{
-        uint64_t ui, uj;
-        Cube c;
-        Coordinate *coord;
-        coord = (Coordinate *)a;
-        if (coord->type != COMP_COORD)
-                return true; /* Not applicable */
-        gen_coord(coord);
-        for (ui = 0; ui < coord->max; ui++) {
-                indexers_makecube(coord->i, ui, &c);
-                uj = indexers_getind(coord->i, &c);
-                if (ui != uj) {
-                        fprintf(stderr, "Error with coordinate %s: "
-                                "%" PRIu64 " != %" PRIu64 "\n",
-                                coord->name, uj, ui);
-                        return false;
-                }
-        }
-        return true;
-}
diff --git a/tests/coord_tests.h b/tests/coord_tests.h
deleted file mode 100644
index 0cfd145..0000000
--- a/tests/coord_tests.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef COORD_TESTS_H
-#define COORD_TESTS_H
-#include "../src/coord.h"
-#include "test_common.h"
-extern Test test_indexes_consistent;
-extern TestSuite coord_pre_init_suite;
-extern TestSuite *coord_suites[];
-#endif
diff --git a/tests/fst_tests.c b/tests/fst_tests.c
deleted file mode 100644
index 1a9bedd..0000000
--- a/tests/fst_tests.c
+++ /dev/null
@@ -1,184 +0,0 @@
-#include "fst_tests.h"
-static bool testmethod_fst_is_consistent(void *);
-static bool testmethod_cube_to_fst_to_cube(void *);
-static bool testmethod_fst_move(void *);
-static bool testmethod_fst_inverse(void *);
-static bool check_equal_and_log(Cube *, Cube *);
-static void void_to_cube(void *, Cube *);
-char *algs[] = {
-        "",
-        "U", "U2", "U'", "D", "D2", "D'", "R", "R2", "R'",
-        "L", "L2", "L'", "F", "F2", "F'", "B", "B2", "B'",
-        "U2 R2 U2 R2 U2",
-        "U2 F2 R2 B2 U2 D2 F2 L2 B2",
-        "RUR'URU2R'",
-        "L2 D R U2 B2 L",
-        "R'U'F",
-        "F2 U' R2 D' B2 D2 R2 D2 R2 U' F L' U' R B F2 R B' D2",
-        "D L2 F2 R2 D R2 U L2 U' B2 D L' F2 U2 B' L D' U' R' B2 F2",
-        "F' L2 F' D' R F2 L U L' D2 R2 F2 D2 R2 B' L2 B2 U2 F D2 B",
-        NULL,
-};
-Test test_fst_is_consistent = {
-        .name  = "Consitency of FST (converted from cube)",
-        .t     = testmethod_fst_is_consistent,
-        .cases = (void **)algs,
-};
-Test test_cube_to_fst_to_cube = {
-        .name  = "Cube to FST to cube",
-        .t     = testmethod_cube_to_fst_to_cube,
-        .cases = (void **)algs,
-};
-Test test_fst_move = {
-        .name  = "FST move",
-        .t     = testmethod_fst_move,
-        .cases = (void **)algs,
-};
-Test test_fst_inverse = {
-        .name  = "FST inverse",
-        .t     = testmethod_fst_inverse,
-        .cases = (void **)algs,
-};
-Test *fst_pre_init[] = {
-        &test_fst_is_consistent,
-        &test_cube_to_fst_to_cube,
-        NULL
-};
-TestSuite fst_pre_init_suite = {
-        .setup    = NULL,
-        .tests    = fst_pre_init,
-        .teardown = NULL,
-};
-Test *fst_post_init[] = {
-        &test_fst_move,
-        &test_fst_inverse,
-        NULL
-};
-TestSuite fst_post_init_suite = {
-        .setup    = init_fst,
-        .tests    = fst_post_init,
-        .teardown = NULL,
-};
-TestSuite *fst_suites[] = {
-        &fst_pre_init_suite,
-        &fst_post_init_suite,
-        NULL
-};
-static bool
-check_equal_and_log(Cube *c, Cube *d)
-{
-        bool ret = equal(c, d);
-        if (!ret) {
-                printf("\n");
-                printf("These cubes should be equal, but are not:\n\n");
-                print_cube(c);
-                printf("\n");
-                print_cube(d);
-                printf("\n");
-        }
-        return ret;
-}
-static void
-void_to_cube(void *a, Cube *c)
-{
-        char *algstr;
-        Alg *alg;
-        algstr = (char *)a;
-        alg = new_alg(algstr);
-        make_solved(c);
-        apply_alg(alg, c);
-        free_alg(alg);
-}
-bool
-testmethod_fst_is_consistent(void *a)
-{
-        FstCube fst_uf, fst_fr, fst_rd;
-        Cube c, c_fr, c_rd;
-        bool consistent_fr, consistent_rd, result;
-        void_to_cube(a, &c);
-        copy_cube(&c, &c_fr);
-        apply_trans(fr, &c_fr);
-        copy_cube(&c, &c_rd);
-        apply_trans(rd, &c_rd);
-        fst_uf = cube_to_fst(&c);
-        fst_fr = cube_to_fst(&c_fr);
-        fst_rd = cube_to_fst(&c_rd);
-        consistent_fr = fst_uf.fr_eofb == fst_fr.uf_eofb &&
-                        fst_uf.fr_eposepe == fst_fr.uf_eposepe &&
-                        fst_uf.fr_coud == fst_fr.uf_coud;
-        consistent_rd = fst_uf.rd_eofb == fst_rd.uf_eofb &&
-                        fst_uf.rd_eposepe == fst_rd.uf_eposepe &&
-                        fst_uf.rd_coud == fst_rd.uf_coud;
-        result = consistent_fr && consistent_rd;
-        if (!result)
-                printf("\nFailed with alg %s\n", (char *)a);
-        return result;
-}
-bool
-testmethod_cube_to_fst_to_cube(void *a)
-{
-        Cube c, d;
-        FstCube fst;
-        void_to_cube(a, &c);
-        fst = cube_to_fst(&c);
-        fst_to_cube(fst, &d);
-        return check_equal_and_log(&c, &d);;
-}
-bool
-testmethod_fst_move(void *a)
-{
-        int i;
-        Alg *alg;
-        Cube c, d;
-        FstCube fst;
-        void_to_cube(a, &c);
-        alg = new_alg((char *)a);
-        make_solved(&d);
-        fst = cube_to_fst(&d);
-        for (i = 0; i < alg->len; i++)
-                fst = fst_move(alg->move[i], fst);
-        fst_to_cube(fst, &d);
-        free_alg(alg);
-        return check_equal_and_log(&c, &d);
-}
-bool
-testmethod_fst_inverse(void *a)
-{
-        Cube c, d;
-        void_to_cube(a, &c);
-        fst_to_cube(fst_inverse(cube_to_fst(&c)), &d);
-        invert_cube(&c);
-        return check_equal_and_log(&c, &d);
-}
diff --git a/tests/fst_tests.h b/tests/fst_tests.h
deleted file mode 100644
index 68bbf04..0000000
--- a/tests/fst_tests.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef FST_TESTS_H
-#define FST_TESTS_H
-#include "../src/fst.h"
-#include "test_common.h"
-extern char *algs[];
-extern Test test_fst_is_consistent;
-extern Test test_cube_to_fst_to_cube;
-extern Test test_fst_move;
-extern Test test_fst_inverse;
-extern TestSuite fst_pre_init_suite;
-extern TestSuite fst_post_init_suite;
-extern TestSuite *fst_suites[];
-#endif
diff --git a/tests/test.c b/tests/test.c
deleted file mode 100644
index 8961de1..0000000
--- a/tests/test.c
+++ /dev/null
@@ -1,85 +0,0 @@
-#include <stdio.h>
-#include "alg_tests.h"
-#include "coord_tests.h"
-#include "fst_tests.h"
-static bool run_test(Test *);
-static bool run_suite(TestSuite *);
-static bool
-run_test(Test *test)
-{
-        int i;
-        printf("Running test %s...", test->name);
-        for (i = 0; test->cases[i] != NULL; i++) {
-                if (!test->t(test->cases[i])) {
-                        printf("FAILED!\n");
-                        return false;
-                }
-        }
-        printf("OK\n");
-        return true;
-}
-static bool
-run_suite(TestSuite *suite)
-{
-        int i;
-        if (suite->setup != NULL)
-                suite->setup();
-        for (i = 0; suite->tests[i] != NULL; i++)
-                if(!run_test(suite->tests[i]))
-                        return false;
-        if (suite->teardown != NULL)
-                suite->teardown();
-        return true;
-}
-static bool
-module_in_args(char *module, int argc, char *argv[])
-{
-        for (int i = 0; i < argc; i++)
-                if (!strcmp(module, argv[i]))
-                        return true;
-        return false;
-}
-int main(int argc, char *argv[]) {
-        /* TODO: init should be in testsuites */
-        init_env();
-        init_trans();
-        /**************************************/
-        TestModule alg   = { .name = "alg",   .suites = alg_suites };
-        TestModule fst   = { .name = "fst",   .suites = fst_suites };
-        TestModule coord = { .name = "coord", .suites = coord_suites };
-        TestModule *modules[999] = {
-                &alg,
-                &fst,
-                &coord,
-                NULL
-        };
-        bool all = argc == 1 || module_in_args("all", argc, argv);
-        int count = 0;
-        for (int i = 0; modules[i] != NULL; i++) {
-                if (all || module_in_args(modules[i]->name, argc, argv)) {
-                        for (int j = 0; modules[i]->suites[j] != NULL; j++) {
-                                if (!run_suite(modules[i]->suites[j])) {
-                                        return 1;
-                                } else {
-                                        count++;
-                                }
-                        }
-                }
-        }
-        printf("All tests passed (%d test suites).\n", count);
-        return 0;
-}
diff --git a/tests/test_common.h b/tests/test_common.h
deleted file mode 100644
index 03511ef..0000000
--- a/tests/test_common.h
+++ /dev/null
@@ -1,41 +0,0 @@
-#ifndef TEST_COMMON_H
-#define TEST_COMMON_H
-/*
- * Common utilities for testing.
- * A VoidMethod can be used as a setup or teardown method for testing, see
- * the TestSuite struct. A TestMethod takes a void pointer (usually cast
- * to some data to be used for testing, but can also be ignored) and returns
- * a bool: true for pass, false for fail.
- * A Test consists of a name (string), a TestMethod and an array of void
- * pointers that describe the test cases. Each element of this array is
- * passed to the test method sequentially, and the test session stops on
- * the first failure.
- * A test suite is just a list of tests with a setup and a teardown method.
- * The setup method is run once and for all before the first test, and the
- * teardown is run at the end of the testsuite.
- * Finally, a TestModule roughly corresponds to a test file. This type is
- * only used in test.c to collect multiple test modules.
- */
-typedef void (*VoidMethod)(void);
-typedef bool (*TestMethod)(void *);
-typedef struct {
-        char *          name;
-        TestMethod      t;
-        void **         cases;
-} Test;
-typedef struct {
-        VoidMethod      setup;
-        Test **         tests;
-        VoidMethod      teardown;
-} TestSuite;
-typedef struct {
-        char *          name;
-        TestSuite **    suites;
-} TestModule;
-#endif
diff --git a/www/download/index.html b/www/download/index.html
deleted file mode 100644
index 8e4cccd..0000000
--- a/www/download/index.html
+++ /dev/null
@@ -1,217 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-        <title> Download | Nissy </title>
-<meta name="viewport" content="width=device-width" />   <link rel="stylesheet" type="text/css" href="/style-3.css">
-        <link rel="icon" href="/favicon.png">
-        <meta charset="utf-8">
-</head>
-<body>
-<nav class="top">
-        <table class="menu">
-        <tr>
-        <td class="logo"> <a href="/"><img src="/favicon.png" alt="logo"></a> </td>
-        <td class="links">
-                <a href="/download/">Download</a> |
-                <a href="/examples/">Examples</a>
-        </td>
-        </tr>
-        </table>
-</nav>
-<hr class="line">
-<h1>Get Nissy</h1>
-<table class="dltable">
-<tr>
-        <td></td>
-        <td><strong>Source code</strong></td>
-        <td><strong>Windows executable</strong></td>
-</tr>
-<tr>
-        <td><strong>Latest version</strong></td>
-        <td><a href="/nissy-2.0.3.tar.gz">nissy-2.0.3.tar.gz (67Kb)</a></td>
-        <td><a href="/nissy-2.0.3.exe">nissy-2.0.3.exe (780Kb)</a></td>
-</tr>
-</table>
-<p>
-In this page you can find download links (see above),
-<a href="#Installation">installation instructions</a> and
-<a href="#Upgrade">upgrade instructions</a>
-for nissy. If instead you wish to clone the
-<a href="https://git.tronto.net/nissy/">git repository</a>,
-you can use git:
-</p>
-<pre>
-<code>git clone https://git.tronto.net/nissy</code>
-</pre>
-<p>
-For a summary of changes and a list of older versions see below. Some versions
-(for example 1.0) are not available directly, but can be obtained from
-the git repository.
-</p>
-<h2 id="Installation">Installation</h2>
-<h3>System requirements</h3>
-<p>
-A full installation of nissy requires about 3.1Gb of space,
-of which 2.3Gb are occupied by the huge pruning table for fast optimal solving,
-and running it requires the same amount of RAM.
-One can choose to never use this function and not to install the relative
-pruning table. There is an alternative (slower)
-optimal solving function that uses about 500Mb of RAM.
-When generating the pruning tables automatically (see the section Tables below),
-at least 5.3Gb or RAM are required.
-</p>
-<h3>Windows</h3>
-<p>
-Try downloading and executing in a terminal the file <code>nissy.exe</code>,
-then follow the instructions in the <strong>Tables</strong> section below for
-installing the pruning tables.
-If <code>nissy.exe</code> does not work, you can try following the UNIX instructions
-in WSL (Windows Subsystem for Linux) or in a similar environment.
-</p>
-<h3>UNIX (Linux, MacOS, *BSD...)</h3>
-<p>
-Download the source archive (.tar.gz). Extract it
-with your favorite archive program, for example with
-</p>
-<pre><code>tar -xvzf nissy-VERSION.tar.gz</code></pre>
-<p>
-Open a terminal in the directory just extracted.
-If you wish, edit the <code>Makefile</code> to match your local configuration
-(this is usually not necessary, but you may want to change the
-<code>PREFIX</code> variable to change the installation path) and run
-<pre><code>make</code></pre>
-<p>
-followed by
-</p>
-<pre><code>make install</code></pre>
-<p>
-Then follow the instructions below to install the pruning tables.
-</p>
-<h3>Tables</h3>
-<p>
-Once you have installed nissy, run
-</p>
-<pre><code>nissy gen</code></pre>
-<p>
-to generate all the tables that Nissy will ever need.
-Running this command requires around 5.3Gb of RAM, and it can take some time
-(about 40 minutes on my fairly old but decent laptop, with 8 CPU threads).
-</p>
-<p>
-Some unnecessary technical detail: by default this command is going to use
-at most 64 threads. If you want you can choose to use more threads (if your CPU
-is very powerful) or fewer threads (if you for example want to run this command
-in the background while you do other stuff) with the <code>-t</code> option, for
-example <code>nissy gen -t 1</code>.
-</p>
-<p>
-Alternatively, you can
-<a href="/nissy-tables-2.0.2.zip">download all the tables (1.7Gb)</a> and
-copy them into the correct folder (see manual page, <code>ENVIRONMENT</code>
-section). On UNIX operating systems this folder is either
-<code>.nissy/tables</code> in the user's home directory or
-<code>$XDG_DATA_HOME/nissy/tables</code> if the XDG variable is configured.
-On Windows it is the same directory as the <code>nissy.exe</code> executable
-file.
-</p>
-<h2 id="Upgrade">Upgrading</h2>
-<p>
-If you already have nissy installed and you want to upgrade to a more
-recent version, you can simply repeat the installation process:
-</p>
-<ul>
-<li>
-On Windows: simply replace nissy.exe with the new file with the same name.
-</li>
-<li>
-On UNIX systems: download the new version of the source code, extract it in
-a new folder and run <code>make</code> and <code>make install</code> again.
-</li>
-</ul>
-<p>
-Between each version new table files might have been added, or old ones
-may be not used anymore. Nissy will deal with this automatically.
-</p>
-<h2>Version history</h2>
-<h3>Nissy v2</h3>
-<table class=dltable>
-<tr>
-        <td><strong>Version</strong></td>
-        <td><strong>Date</strong></td>
-        <td><strong>Comment</strong></td>
-</tr>
-<tr>
-        <td><a href="/nissy-2.0.3.tar.gz">2.0.3</a></td>
-        <td>2022-09-10</td>
-        <td>Fixed bug in scramble dr</td>
-</tr>
-<tr>
-        <td><a href="/nissy-2.0.2.tar.gz">2.0.2</a></td>
-        <td>2022-06-01</td>
-        <td>Improved table generation speed</td>
-</tr>
-<tr>
-        <td><a href="/nissy-2.0.1.tar.gz">2.0.1</a></td>
-        <td>2022-02-22</td>
-        <td>Bugfix release</td>
-</tr>
-<tr>
-        <td>2.0</td>
-        <td>2021-12-29</td>
-        <td>Rewritten from scratch; much faster optimal solver</td>
-</tr>
-</table>
-<h3>Nissy v1</h3>
-<p>
-Nissy v1 was released in 2020. It was slow, full of bugs and the code
-was quite terrible. But in practice it got its job done most of the time.
-</p>
-<hr class="line">
-<nav class="bottom">
-        <table class="footer">
-        <tr>
-        <td class="contact">
-                <a href="https://sebastiano.tronto.net">sebastiano.tronto.net</a>
-        </td>
-        <td class="hosted">
-                <a href="mailto:sebastiano@tronto.net">
-                        sebastiano@tronto.net
-                </a>
-        </td>
-        </tr>
-        </table>
-</nav>
-</body>
-</html>
diff --git a/www/examples/index.html b/www/examples/index.html
deleted file mode 100644
index 517c251..0000000
--- a/www/examples/index.html
+++ /dev/null
@@ -1,49 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-        <title> Examples | Nissy </title>
-<meta name="viewport" content="width=device-width" />   <link rel="stylesheet" type="text/css" href="/style-3.css">
-        <link rel="icon" href="/favicon.png">
-        <meta charset="utf-8">
-</head>
-<body>
-<nav class="top">
-        <table class="menu">
-        <tr>
-        <td class="logo"> <a href="/"><img src="/favicon.png" alt="logo"></a> </td>
-        <td class="links">
-                <a href="/download/">Download</a> |
-                <a href="/examples/">Examples</a>
-        </td>
-        </tr>
-        </table>
-</nav>
-<hr class="line">
-<h1>Examples</h1>
-(Coming soon...)
-<hr class="line">
-<nav class="bottom">
-        <table class="footer">
-        <tr>
-        <td class="contact">
-                <a href="https://sebastiano.tronto.net">sebastiano.tronto.net</a>
-        </td>
-        <td class="hosted">
-                <a href="mailto:sebastiano@tronto.net">
-                        sebastiano@tronto.net
-                </a>
-        </td>
-        </tr>
-        </table>
-</nav>
-</body>
-</html>
diff --git a/www/favicon.png b/www/favicon.png
deleted file mode 100644
index 3ec80a1..0000000
--- a/www/favicon.png
+++ /dev/null
Binary files differ
diff --git a/www/index.html b/www/index.html
deleted file mode 100644
index 500952c..0000000
--- a/www/index.html
+++ /dev/null
@@ -1,93 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-        <title> Nissy | Nissy </title>
-<meta name="viewport" content="width=device-width" />   <link rel="stylesheet" type="text/css" href="/style-3.css">
-        <link rel="icon" href="/favicon.png">
-        <meta charset="utf-8">
-</head>
-<body>
-<nav class="top">
-        <table class="menu">
-        <tr>
-        <td class="logo"> <a href="/"><img src="/favicon.png" alt="logo"></a> </td>
-        <td class="links">
-                <a href="/download/">Download</a> |
-                <a href="/examples/">Examples</a>
-        </td>
-        </tr>
-        </table>
-</nav>
-<hr class="line">
-<h1>Nissy</h1>
-<p class=subtitle>A Rubik's cube solver and FMC assistant</p>
-<img src="/screenshot.png" alt="A screenshot of nissy running in a terminal emulator">
-<p>
-Nissy is a command-line Rubik's cube solver. It can find optimal solutions
-for random positions using techniques from Herbert Kociemba's
-<a href="http://kociemba.org/cube.htm">Cube Explorer</a> and
-Tomas Rokicki's
-<a href="https://github.com/rokici/cube20src/blob/master/nxopt.md">nxopt</a>.
-With 4 cores at 2.5GHz and using about 3Gb of RAM, Nissy can find an optimal
-solution in about a minute on average.
-</p>
-<p>
-Nissy aims at being a complete tool
-for FMC (Fewest Moves Challenge) practice. It can solve different steps
-of Thistlethwaite's algorithm (also know as DR/HTR) and cans use NISS
-(Normal-Inverse Scramble Switch).
-</p>
-<p>
-You should use Nissy if:
-</p>
-<ul>
-<li>
-You want to analyze your DR solutions or check for multiple optimal
-(or sub-optimal) solutions for EO/DR/HTR or similar steps.
-</li>
-<li>
-You just want a Rubik's cube solver and you like command line interfaces.
-</li>
-<li>
-You want an alternative to Cube Explorer.
-</li>
-</ul>
-<p>
-To get started, head to the <a href="/download/">download</a> page.
-</p>
-<p>
-You can also see its source code by cloning the git repository
-<a href="https://git.tronto.net/nissy/">git.tronto.net/nissy</a>
-</p>
-<hr class="line">
-<nav class="bottom">
-        <table class="footer">
-        <tr>
-        <td class="contact">
-                <a href="https://sebastiano.tronto.net">sebastiano.tronto.net</a>
-        </td>
-        <td class="hosted">
-                <a href="mailto:sebastiano@tronto.net">
-                        sebastiano@tronto.net
-                </a>
-        </td>
-        </tr>
-        </table>
-</nav>
-</body>
-</html>
diff --git a/www/screenshot.png b/www/screenshot.png
deleted file mode 100644
index a73f2fd..0000000
--- a/www/screenshot.png
+++ /dev/null
Binary files differ
diff --git a/www/style-3.css b/www/style-3.css
deleted file mode 100644
index ec70635..0000000
--- a/www/style-3.css
+++ /dev/null
@@ -1,105 +0,0 @@
-.menu {
-        width:                  100%;
-}
-.links {
-        text-align:             right;
-        font-weight:            bold;
-}
-.logo img {
-        width:                  50px;
-        height:                 50px;
-}
-.footer {
-        font-style:             italic;
-        width:                  100%;
-}
-.hosted {
-        text-align:             right;
-}
-body {
-        margin:                 auto 8px 20px 8px;
-}
-img {
-        display:                block;
-        margin-left:            auto;
-        margin-right:           auto;
-        max-width:              100%;
-}
-code {
-        background-color:       #eeeeee;
-        padding:                2px;
-}
-pre code {
-        padding:                0px;
-}
-pre {
-        background-color:       #eeeeee;
-        border:                 2px solid;
-        padding:                6px;
-}
-#blob {
-        background:             #ffffff;
-        border:                 none;
-}
-a {
-        color:                  #0f2899;
-        text-decoration:        none;
-}
-.links a {
-        font-weight:            bold;
-        color:                  black;
-}
-.hosted a,
-.contact a {
-        font-weight:            bold;
-}
-a:hover {
-        text-decoration:        underline;
-}
-html {
-        margin:                 1em auto;
-        max-width:              42em;
-}
-h1 {
-        text-align:             center;
-}
-td h1 {
-        text-align:             left;
-        font-size:              1.5em;
-}
-table {
-        width:                  100%;
-}
-.url td {
-        font-family:            monospace;
-}
-.dltable th, .dltable td {
-        border:                 1px solid black;
-        padding:                3px;
-}
-.subtitle {
-        text-align:             center;
-        font-weight:            bold;
-        font-size:              1.1em;
-}