Merge the "solver-experiments" branch that I have been working on for

a few weeks. This include mainly three things:

1. Various tweaks for a total performance gain of around 30%.
2. Take into account symmetries and avoid repeated work. This
   required a re-work of the splitting into tasks before the solve.
3. Add a second fallback table (eoesep). This gives huge performance
   gains for particular scrambles (e.g. superflip).

After merging this commit, remove and re-generate all pruning tables.

Squashed commit of the following:

commit 60f0705d2d69050e6a30581a2810f686d6f69b80
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 16:06:48 2024 +0100

    Fix indentation

commit cc5d489a251812b6188c0ba264ac6cb2236f1afe
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 15:56:19 2024 +0100

    Updated documentation

commit a3f605dd628546e52564f82b139feb473b0725f3
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Dec 7 14:01:11 2024 +0100

    use eoesep table as second fallback

commit c75e43c9116c64f97e92b0fe038be8a032925a72
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Dec 6 16:13:23 2024 +0100

    First commit for gendata_eoesep

commit fea7688ab8bdc5ae0c3480622e2510a3bcd39248
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:31:00 2024 +0100

    Add scramble to tool

commit 66866cb71dea4ca8278ecb9e90ff4295771feb42
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:22:59 2024 +0100

    Added tool to check multiple solutions

commit ef65611c772c3996bddca8d181da3538e0af1674
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Dec 3 17:16:20 2024 +0100

    Write all solutions for symmetric positions

commit e3ded26db7d7d4ae7c0e2488151ed14f581f7b8e
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Nov 26 09:14:54 2024 +0100

    Added symmetry filter (TODO: print excluded solutions)

commit 864c437a9751c58d58562650ca9eba4a9e6ad3eb
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Nov 25 14:51:13 2024 +0100

    Improved task split

commit b88926d36d7ab0c64c5fe3bb954fd15d41267fba
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Nov 22 19:06:41 2024 +0100

    Reworked tasks for multi-threading in view of symmetry filter

commit 26fa653f97df8cd601aecb80eaf89f0a00e9ba9f
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 15:37:43 2024 +0100

    Added transform move

commit 19f655ef94d658eaa2fefb5cea3c167a3ec58db6
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 09:29:15 2024 +0100

    Clarified doc

commit 3b0fe1e5ef8b628854e30f0f0067300e2763c954
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 08:36:58 2024 +0100

    Handle solved cube correctly

commit 57705cbc4982e3abe97a36ed64871738d4f721c0
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Thu Oct 31 08:24:30 2024 +0100

    Close file

commit fc7d462b58bcf3d3a3fbf26c1f3bd04c640a4898
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 15:05:48 2024 +0100

    Removed stats tool

commit 359bf7cb49ef405ee76ed662207d47cb2abcc5a9
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 15:01:51 2024 +0100

    Updated theory doc

commit 39c315af562bc4ce896f41004388a4c34d475d37
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 14:51:40 2024 +0100

    Remove unused constants

commit 57a5d24538aa59a4df9221dad2f99e9f0286bd9d
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Tue Oct 29 10:20:38 2024 +0100

    Add tool to solve scrambles from file

commit 07e2918c216636891b1fa6adecc9756086a901e9
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Oct 28 17:00:00 2024 +0100

    Add make table to tool

commit f5e5266c654eb027a5a35c57cc618555246f5e5e
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Mon Oct 28 09:35:49 2024 +0100

    Remove old solver, other small things

commit a1ec78025b7959dbb845213f7f4e6851ecebc204
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sun Oct 27 02:00:29 2024 +0200

    Improvements

commit 8eea23dbe888d923e662e24ae969130e2c67b999
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Sat Oct 26 12:24:19 2024 +0200

    Makefile fix

commit 3fc3927beacc78971cefeb42da8d71fe6c015fc1
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Oct 25 18:25:09 2024 +0200

    More performance gains

commit 7b4efa1f9af9722de1ab9ccfc27899825a0d12c4
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Fri Oct 25 15:53:20 2024 +0200

    Alternative solver implementation, small performance gain

1 files changed, 0 insertions, 100 deletions

diff --git a/src/solvers/h48/stats.h b/src/solvers/h48/stats.h
deleted file mode 100644
index 2a7e887..0000000
--- a/src/solvers/h48/stats.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
-The h48stats solver computes how many moves it takes to solve to
-each of the 12 h48 coordinates, one for each value of h from 0 to 11.
-The solutions array is filled with the length of the solutions. The
-solutions array is therefore not a printable string.
-*/
-
-typedef struct {
-        cube_t cube;
-        int8_t nmoves;
-        int8_t depth;
-        uint8_t moves[MAXLEN];
-        const uint32_t *cocsepdata;
-        const uint8_t *h48data;
-        char *s;
-} dfsarg_solveh48stats_t;
-
-STATIC int64_t solve_h48stats_dfs(dfsarg_solveh48stats_t *);
-STATIC int64_t solve_h48stats(cube_t, int8_t, const void *, char [static 12]);
-
-STATIC int64_t
-solve_h48stats_dfs(dfsarg_solveh48stats_t *arg)
-{
-        const int64_t limit = 11;
-
-        int8_t bound, u;
-        uint8_t m;
-        uint32_t d;
-        int64_t coord, h;
-        dfsarg_solveh48stats_t nextarg;
-
-        /* Check cocsep lower bound (corners only) */
-        bound = get_h48_cdata(arg->cube, arg->cocsepdata, &d);
-        if (bound + arg->nmoves > arg->depth)
-                return 0;
-
-        /* Check h48 lower bound for h=0 (esep, but no eo) */
-        coord = coord_h48_edges(arg->cube, COCLASS(d), TTREP(d), 0);
-        bound = get_h48_pval(arg->h48data, coord, 4);
-        if (bound + arg->nmoves > arg->depth)
-                return 0;
-        
-        /* Update all other values, if solved */
-        coord = coord_h48_edges(arg->cube, COCLASS(d), TTREP(d), 11);
-        for (h = 0; h <= limit; h++) {
-                u = coord >> (11-h) == 0 && arg->s[h] == 99;
-                arg->s[h] = u * arg->nmoves + (1-u) * arg->s[h];
-        }
-
-        if (arg->s[limit] != 99)
-                return 0;
-
-        nextarg = *arg;
-        nextarg.nmoves = arg->nmoves + 1;
-        for (m = 0; m < 18; m++) {
-                nextarg.moves[arg->nmoves] = m;
-                if (!allowednextmove(nextarg.moves, nextarg.nmoves)) {
-                        /* If a move is not allowed, neither are its 180
-                         * and 270 degree variations */
-                        m += 2;
-                        continue;
-                }
-                nextarg.cube = move(arg->cube, m);
-                solve_h48stats_dfs(&nextarg);
-        }
-
-        return 0;
-}
-
-STATIC int64_t
-solve_h48stats(
-        cube_t cube,
-        int8_t maxmoves,
-        const void *data,
-        char solutions[static 12]
-)
-{
-        int i;
-        dfsarg_solveh48stats_t arg;
-
-        arg = (dfsarg_solveh48stats_t) {
-                .cube = cube,
-                .cocsepdata = (uint32_t *)((char *)data + INFOSIZE),
-                .h48data = (uint8_t *)data + COCSEP_FULLSIZE + INFOSIZE,
-                .s = solutions
-        };
-
-        for (i = 0; i < 12; i++)
-                solutions[i] = (char)99;
-
-        for (arg.depth = 0;
-             arg.depth <= maxmoves && solutions[11] == 99;
-             arg.depth++)
-        {
-                arg.nmoves = 0;
-                solve_h48stats_dfs(&arg);
-        }
-
-        return 0;
-}