# TODO-list for version 2.1 (or is it 3.0 at this point?)

## Rework solver

* Split solve in solve_coord, solve_generic (and maybe solve_singlethread, see
  notes about build options).
* Add a void * extradata to DfsArg.
* remove cube from dfsarg? (i still need to save the scramble somewhere,
  but I really only use it in dfs_niss)
* Re-work prepare_step process for solve_generic (nxopt table is special).
* is_valid should also unnis and / or cleanup the alg.

## New optimal solver (use fst)

* 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.

## 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).