Freecell Solver version 3.4.0 has been released. It is available in the form of a source tarball from the download page.
In this release, we've added the --set-pruning flag to turn on the Horne's play prune, which improves performance. There are two new presets - -l enlightened-ostrich (or -l eo for short), which makes use of --set-pruning and is the fastest preset yet, and -l maliciously-obscure (-l mo) which is slow but generates especially short solutions.
We added a compile-time option to use RCS-like states storage which conserves a lot of RAM and allowed Freecell Solver to scale to over 200 million positions on an x86-64 machine with 64 GB of RAM (which was utilised for that courtesy of Amadiro's university). There are many other major and minor speed and memory optimisations in this release.
The --ms and -M flags were added to the make_pysol_freecell_board.py program, to generate Microsoft deals even for numbers higher than 32,000, which are different in PySol and PySolFC. Furthermore, the CMake configuration was updated to use "lib${LIB_SUFFIX}", so it can be built on some 64-bit systems.
Finally, there's an experimental --trim-max-stored-states which currently may crash the solver, but we decided to release it despite this fact.
All of these changes prove to be a huge step forward for Freecell Solver making this release its best release yet.
