Crate shakmaty_syzygy[−][src]

Expand description

Probe Syzygy endgame tablebases.

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

Example

use shakmaty::{CastlingMode, Chess, fen::Fen};
use shakmaty_syzygy::{Tablebase, MaybeRounded, Wdl, Dtz, Syzygy};

let mut tables = Tablebase::new();
tables.add_directory("tables/chess")?;

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

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

let dtz = tables.probe_dtz(&pos)?;
assert!(matches!(dtz, MaybeRounded::Rounded(Dtz(-59))));

Errors

See SyzygyError for possible error conditions.

Cargo features

variant: Enables support for Antichess and Atomic chess.
backtrace: Provides a backtrace field on ProbeError::CorruptedTable. This may be useful to identify issues with corrupted tablebase files or to debug the probing code. Currently requires nightly Rust.