Goal: Checkmate the opponent's King by placing it under unescapable attack.
Special Moves: Supports Castling (Kingside/Queenside), En Passant pawn captures, and Pawn Promotion (Queen, Rook, Bishop, Knight).
Draw Rules: This browser version automatically ends on stalemate, threefold repetition, 100 halfmoves without a pawn move/capture, or supported dead-material cases.
Move Rules: Standard 8×8 orthodox movement and king-safety rules. The automatic 100-halfmove draw is a browser house adjudication rather than a tournament claim procedure.