Free board game · Chess
Chess 国际象棋
Full rules, three AI levels. Castling, en passant and promotion all enforced.
Choose promotion
Tap a piece to see its legal moves, then tap a target square. Drag also works.
How to play
White moves first. Select a piece to see every legal square, then select a target. The engine rejects illegal moves — including moves that leave your own king in check.
- vs AI: three levels search 1, 2 and 3 plies with alpha-beta pruning, material values and piece-square tables. Every move is capped at 400 ms.
- 2 players: take turns on the same device. Undo works for both sides.
- Undo steps back one move locally, or back to your turn against the AI. Castling, en passant and promotion are all recognised.
Rules (EN): castling, en passant, and the first five moves →