/// <summary> /// Determine whether the given move is valid for this chess piece on the given chess board. /// </summary> /// <param name="chessBoard">The chess board on which the chess piece is being moved.</param> /// <param name="from">The board position from which the chess piece is being moved.</param> /// <param name="to">The board position to which the chess piece is being moved.</param> /// <returns></returns> internal virtual MoveResult ValidateMove( ChessBoard chessBoard, BoardPosition from, BoardPosition to, out ExceptionReasonDetail exceptionReasonDetail) { exceptionReasonDetail = ExceptionReasonDetail.None; return MoveResult.Illegal; }
internal override MoveResult ValidateMove( ChessBoard chessBoard, BoardPosition from, BoardPosition to, out ExceptionReasonDetail exceptionReasonDetail) { exceptionReasonDetail = ExceptionReasonDetail.None; MoveResult result = MoveResult.Illegal; int fileDiff = Math.Abs(from.InternalFile - to.InternalFile); int forward = (this.Colour == Colour.White) ? to.InternalRank - from.InternalRank : from.InternalRank - to.InternalRank; Square toSquare = chessBoard.GetSquare(to); if (forward == 1) { if (fileDiff == 0) { if (toSquare.ChessPiece != null) { result = MoveResult.Collision; } else { result = MoveResult.Valid; } } if (fileDiff == 1) { if (toSquare.ChessPiece != null && toSquare.ChessPiece.Colour != this.Colour) { result = MoveResult.Valid; } else { exceptionReasonDetail = ExceptionReasonDetail.PawnCannotMoveDiagonallyUnlessCapturing; } } } if (forward == 2 && fileDiff == 0) { bool onHomeRank = (this.Colour == Colour.White && from.Rank == 2) || (this.Colour == Colour.Black && from.Rank == 7); if (onHomeRank && chessBoard.Round == 1) { int inbetweenFile = from.InternalFile; int inbetweenRank = (this.Colour == Colour.White) ? from.InternalRank + 1 : from.InternalRank - 1; Square inbetweenSquare = chessBoard.GetSquare(new BoardPosition(inbetweenFile, inbetweenRank)); if (inbetweenSquare.ChessPiece != null) { result = MoveResult.Collision; } else { if (toSquare.ChessPiece == null) { result = MoveResult.Valid; } } } else { exceptionReasonDetail = ExceptionReasonDetail.PawnCannotMoveTwoSpacesAtThisTime; } } return result; }
internal override MoveResult ValidateMove( ChessBoard chessBoard, BoardPosition from, BoardPosition to, out ExceptionReasonDetail exceptionReasonDetail) { exceptionReasonDetail = ExceptionReasonDetail.None; MoveResult result = MoveResult.Illegal; int fileDiff = Math.Abs(from.InternalFile - to.InternalFile); int rankDiff = Math.Abs(from.InternalRank - to.InternalRank); if ((fileDiff == 2 && rankDiff == 1) || (fileDiff == 1 && rankDiff == 2)) { Square toSquare = chessBoard.GetSquare(to); if (toSquare.ChessPiece == null || toSquare.ChessPiece.Colour != this.Colour) { result = MoveResult.Valid; } } return result; }
public ChessBoardException(ExceptionReason exceptionReason, ExceptionReasonDetail exceptionReasonDetail, Exception innerException) : base(MessageFromExceptionReason(exceptionReason), innerException) { this.ExceptionReason = exceptionReason; this.ExceptionReasonDetail = exceptionReasonDetail; }
public ChessBoardException(ExceptionReason exceptionReason, ExceptionReasonDetail exceptionReasonDetail) : this(exceptionReason, exceptionReasonDetail, null) { }