shakmaty

A Rust library for chess move generation

Features

• Generate legal moves:

  use shakmaty::{Chess, Position};
  
  let pos = Chess::default();
  let legals = pos.legals();
  assert_eq!(legals.len(), 20);
  

• Play moves:

  use shakmaty::{Square, Move, Role};
  
  // 1. e4
  let pos = pos.play(&Move::Normal {
      role: Role::Pawn,
      from: Square::E2,
      to: Square::E4,
      capture: None,
      promotion: None,
  })?;
  

• Detect game end conditions: pos.is_checkmate(), pos.is_stalemate(), pos.is_insufficient_material(), pos.outcome().

• Read and write FENs, SANs and UCIs.

• Supports Standard chess, Chess960, Giveaway and Atomic. Provides vocabulary to implement other variants.

• Bitboards and compact fixed shift magic attack tables.

• Probe Syzygy tablebases with shakmaty-syzygy.

Documentation

Read the documentation

Changelog

• 0.6.6
  • Fix missing king promotions in Giveaway.
• 0.6.5
  • Validate color of missing king in atomic chess.
  • Clear move buffers before generating variant moves.
• 0.6.4
  • Reintroduce Giveaway and Atomic chess variants.
• 0.6.3
  • New method Move.is_zeroing().
• 0.6.2
  • Make unit error types (InvalidSquareName, InvalidUci, InvalidSan) completely public.
  • Documentation, coding style and debugging tweaks.
• 0.6.1
  • Expose attacks::bishop_mask and attacks::rook_mask.
  • Eliminate almost all unchecked indexing.
• 0.6.0
  • Split impl From<Move> for Uci into uci() and chess960_uci().
  • Fix display of pawn drops.
  • Move generating methods clear the move buffer (and therefor no longer panic on too full buffers).
  • Added Position.is_chess960(), Bitboard.without_all(), Role.upper_char(), Board.stepper().
• 0.5.1
  • Fix Uci::to_move() for en passant moves. Thanks zxqfl.
• 0.5.0
  • Use u64 instead of usize for perft().
  • Export error type InvalidSquareName.
  • New methods: CastlingSide.is_{queen|king}_side(), San.matches(), Move.is_capture(), Move.is_promotion(), Move.castling_side(), Position.is_check().
  • Derive Ord and PartialOrd for Role.
  • Support running benchmarks on stable.
• 0.4.2
  • Fix build error on beta due to the new nightly option_filter feature.
  • Fix unterminated code block in documentation.
• 0.4.1
  • Fix build error due to the new nightly option_filter feature.
• 0.4.0
  • Rename Color::from_bool() to Color::from_white(), add Color::from_black().
  • Add Move::role(), Move::is_en_passant() and Move::is_castle().
  • Add Position::en_passant_moves() and Position::capture_moves().
  • Implement BitXor<bool> for Color.
  • Implement FusedIterator and TrustedLen on Bitboard.
• 0.3.0
  • Switch to #[repr(i8)] for Square. Implement all lossless integer conversions From<Square>.
  • Add Square::flip_horizontal(), flip_vertical() and flip_diagonal().
  • Efficiently implement CarryRippler::last() by @nvzqz.
  • Eliminate some unchecked indexing by @nvzqz.
  • Faster ASCII case conversions and tests by @nvzqz.
• 0.2.0
  • Square is now a #[repr(u8)] enum.
  • Use bitflags for PositionError.
  • Rename RemainingChecks::subtract() to decrement().
  • Add Position::swap_turn().
• 0.1.0
  • First release with support for stable Rust.

License

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