shakmaty-syzygy

A Rust library to probe Syzygy endgame tablebases, based on shakmaty.

Syzygy tables allow optimal play under the 50-move rule. Tables are available for positions with up to 6 (and experimentally 7) pieces.

Example

use shakmaty::Chess;
use shakmaty::fen::Fen;
use shakmaty_syzygy::{Tablebases, Wdl, Dtz, Syzygy};

let mut tables = Tablebases::new();
tables.add_directory("tables/regular")?;

let pos: Chess = "8/8/8/8/B7/N7/K2k4/8 b - - 0 1"
    .parse::<Fen>()?
    .position()?;

let wdl = tables.probe_wdl(&pos)?;
assert_eq!(wdl, Wdl::Loss);

let dtz = tables.probe_dtz(&pos)?;
assert_eq!(dtz, Dtz(-59));

Documentation

Read the documentation

Changelog

• 0.1.2
  • Cosmetic tweak to DTZ in case of mate in 1.
• 0.1.1
  • Optional serde-1 feature.
  • Add Dtz.add_plies().
• 0.1.0
  • First release.

Acknowledgement

Thanks to Ronald de Man for his Syzygy tablebases. The probing code is closely based on his implementation for Stockfish.

License

shakmaty-syzygy is licensed under the GPL-3.0 (or any later version at your option). See the COPYING file for the full license text.