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);
}
}
}