public General(ChessPoint point, Chessboard board, bool isRed) : base(point, board, isRed) { }
public Cannon(ChessPoint point, Chessboard board, bool isRed) : base(point, board, isRed) { }
public King(ChessPoint point, Chessboard board, bool isRed) : base(point, board, isRed) { }