public Piece Move(Position origin, Position destination)
{
Piece piece = Board.RemPiece(origin);
piece.IncrementQtyMovement();
Piece capturedPiece = Board.RemPiece(destination);
Board.AddPiece(piece, destination);
if (capturedPiece != null)
{
CapturedPieces.Add(capturedPiece);
}
// Castling
if (piece is King && destination.Col == origin.Col + 2)
{
Position originRook = new Position(origin.Row, origin.Col + 3);
Position destinationRook = new Position(origin.Row, origin.Col + 1);
Piece rook = Board.RemPiece(originRook);
rook.IncrementQtyMovement();
Board.AddPiece(rook, destinationRook);
}
if (piece is King && destination.Col == origin.Col - 2)
{
Position originRook = new Position(origin.Row, origin.Col - 4);
Position destinationRook = new Position(origin.Row, origin.Col - 1);
Piece rook = Board.RemPiece(originRook);
rook.IncrementQtyMovement();
Board.AddPiece(rook, destinationRook);
}
// En Passant
if (piece is Pawn)
{
if (origin.Col != destination.Col && capturedPiece == null)
{
Position pawnPos;
if (piece.Color == Color.White)
{
pawnPos = new Position(destination.Row + 1, destination.Col);
}
else
{
pawnPos = new Position(destination.Row - 1, destination.Col);
}
capturedPiece = Board.RemPiece(pawnPos);
CapturedPieces.Add(capturedPiece);
}
}
return(capturedPiece);
}
public void UndoMove(Position origin, Position destination, Piece capturedPiece)
{
Piece piece = Board.RemPiece(destination);
piece.DecrementQtyMovement();
if (capturedPiece != null)
{
Board.AddPiece(capturedPiece, destination);
CapturedPieces.Remove(capturedPiece);
}
Board.AddPiece(piece, origin);
// Castling
if (piece is King && destination.Col == origin.Col + 2)
{
Position originRook = new Position(origin.Row, origin.Col + 3);
Position destinationRook = new Position(origin.Row, origin.Col + 1);
Piece rook = Board.RemPiece(destinationRook);
rook.DecrementQtyMovement();
Board.AddPiece(rook, originRook);
}
if (piece is King && destination.Col == origin.Col - 2)
{
Position originRook = new Position(origin.Row, origin.Col - 4);
Position destinationRook = new Position(origin.Row, origin.Col - 1);
Piece rook = Board.RemPiece(destinationRook);
rook.DecrementQtyMovement();
Board.AddPiece(rook, originRook);
}
// En Passant
if (piece is Pawn)
{
if (origin.Col != destination.Col && capturedPiece == VulnerableEnPassant)
{
Piece pawn = Board.RemPiece(destination);
Position pawnPos;
if (piece.Color == Color.White)
{
pawnPos = new Position(3, destination.Col);
}
else
{
pawnPos = new Position(4, destination.Col);
}
Board.AddPiece(pawn, pawnPos);
}
}
}
public void ExecuteRound(Position origin, Position destination)
{
Piece capturedPiece = Move(origin, destination);
if (IsInCheck(CurrentPlayer))
{
UndoMove(origin, destination, capturedPiece);
throw new BoardException("You cannot put yourself in Check!");
}
Piece piece = Board.GetPiece(destination);
// Pawn Promotion
if (piece is Pawn)
{
if ((piece.Color == Color.White && destination.Row == 0) || (piece.Color == Color.Black && destination.Row == 7))
{
piece = Board.RemPiece(destination);
Pieces.Remove(piece);
piece = new Queen(Board, piece.Color);
Board.AddPiece(piece, destination);
Pieces.Add(piece);
}
}
Check = IsInCheck(OpponentColor(CurrentPlayer));
if (IsInCheckMate(OpponentColor(CurrentPlayer)))
{
Finished = true;
}
else
{
ChangePlayer();
Round++;
}
// En Passant
if (piece is Pawn && (destination.Row == origin.Row - 2 || destination.Row == origin.Row + 2))
{
VulnerableEnPassant = piece;
}
else
{
VulnerableEnPassant = null;
}
}