A library for computing chess moves.
eschac implements fast legal move generation and a copy-make interface that enforces at compile time that no illegal move is played, with no runtime checks and no potential panics.
use eschac::prelude::*;
// read a position from a text record
let setup = Setup::from_text_record("7k/4P1rp/5Q2/5p2/1Pp1bP2/8/r4K1P/6R1 w - -")?;
let position = setup.into_position()?;
// read a move in algebraic notation
let san = "Ke1".parse::<San>()?;
let m = san.to_move(&position)?;
// play the move (note the absence of error handling)
let position = m.make();
// generate all the legal moves on the new position
let moves = position.legal_moves();
for m in moves {
// print the UCI notation of each move
println!("{}", m.to_uci());
}shakmaty is another Rust library for chess processing. It is written by Niklas Fiekas, whose work greatly inspired the development of eschac. Both libraries have similar base features to handle the chessboard – editing the position & making moves – as well as fast move generation. eschac distinguishes itself with a focus on performance for standard chess, a more compact board representation and its use of the borrow checker. shakmaty on the other hand has a more complex interface that handles chess960 and other variants, and offers more features such as PGN parsing, Zobrist hashing, Syzygy endgame tablebases, and more.
eschac is licensed under AGPL-3.0 (or any later version at your option).