WIP - Shogi and shogi variant rules written in dart. Based on dartchess and shogiops.

Features

• Completely immutable Position class
• Read and write SFEN
• Read and write USI
• Shogi rules:
  • move/drop making
  • legal moves/drops generation
  • game end and outcome
  • setup validation
• Shogi variants: Minishogi, Chushogi, Annanshogi, Kyotoshogi, Checkshogi, Dobutsu
• KIF and CSA parser and writer (NOT YET SUPPORTED)
• Move notation - Western, Japanese, Kitao-Kawasaki, Yorozuya
• Bitboards
• Attacks and rays using hyperbola quintessence

Example

import 'package:dartshogi/dartshogi.dart';

  // Parse sfen and create a valid shogi position
  final pos = parseSfen(Rule.shogi, initialSfen(Rule.shogi)).getOrThrow();

  // Generate all legal moves
  assert(pos.allMoveDests().length == 40);

  // Parse usi
  final move = MoveOrDrop.parse('7g7f')!;

  assert(pos.isLegal(move));

  // Play moves
  final pos2 = pos.play(move).getOrThrow();

  // Detect game end conditions
  assert(pos2.outcome() == null);