public void UndoMove(Position origin, Position destiny, Piece capturedPiece)
{
Piece p = Board.RemovePiece(destiny);
p.DecrementMoves();
if (capturedPiece != null)
{
Board.PutPiece(capturedPiece, destiny);
Captured.Remove(capturedPiece);
}
Board.PutPiece(p, origin);
//Little Castle
if (p is King && destiny.Column == origin.Column + 2)
{
Position rookOrigin = new Position(origin.Row, origin.Column + 3);
Position rookDestiny = new Position(origin.Row, origin.Column + 1);
Piece R = Board.RemovePiece(rookDestiny);
R.DecrementMoves();
Board.PutPiece(R, rookOrigin);
}
//Big Castle
if (p is King && destiny.Column == origin.Column - 2)
{
Position rookOrigin = new Position(origin.Row, origin.Column - 4);
Position rookDestiny = new Position(origin.Row, origin.Column - 1);
Piece R = Board.RemovePiece(rookDestiny);
R.DecrementMoves();
Board.PutPiece(R, rookOrigin);
}
//En Passant
if (p is Pawn)
{
if (origin.Column != destiny.Column && capturedPiece == vulnerableEnPassant)
{
Position posP;
Piece pawn = Board.RemovePiece(destiny);
if (p.Color == Color.White)
{
posP = new Position(3, destiny.Column);
}
else
{
posP = new Position(4, destiny.Column);
}
Board.PutPiece(pawn, posP);
}
}
}
