lichess-org / dartchess

Dart chess library for native platforms

Chess and chess variant rules written in dart for native platforms (does not support web).

Features

• Completely immutable Position class
• Read and write FEN
• Read and write SAN
• Chess rules:
  • move making
  • legal moves generation
  • game end and outcome
  • insufficient material
  • setup validation
• Chess960 support
• Chess variants: Antichess, Atomic, Crazyhouse, KingOfTheHill, ThreeCheck
• PGN parser and writer
• Bitboards
• Attacks and rays using hyperbola quintessence

Example

import 'package:dartchess/dartchess.dart';

final pos = Chess.fromSetup(Setup.parseFen('r1bqkbnr/ppp2Qpp/2np4/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 4'));
assert(pos.isCheckmate == true);

Additional information

This package was heavily inspired from:

• https://github.com/niklasf/chessops
• https://github.com/niklasf/shakmaty