private Piece MakeMove(Position source, Position target)
{
ChessPiece p = (ChessPiece)_board.RemovePiece(source);
p.IncreaseMoveCount();
Piece capturedPiece = _board.RemovePiece(target);
_board.PlacePiece(p, target);
if (capturedPiece != null)
{
_piecesOnTheBoard.Remove(capturedPiece);
_capturedPieces.Add(capturedPiece);
}
// #specialmove castling kingside rook
if (p is King && target.Column == source.Column + 2)
{
Position sourceT = new Position(source.Row, source.Column + 3);
Position targetT = new Position(source.Row, source.Column + 1);
ChessPiece rook = (ChessPiece)_board.RemovePiece(sourceT);
rook.IncreaseMoveCount();
_board.PlacePiece(rook, targetT);
}
// #specialmove castling queenside rook
if (p is King && target.Column == source.Column - 2)
{
Position sourceT = new Position(source.Row, source.Column - 4);
Position targetT = new Position(source.Row, source.Column - 1);
ChessPiece rook = (ChessPiece)_board.RemovePiece(sourceT);
rook.IncreaseMoveCount();
_board.PlacePiece(rook, targetT);
}
// #specialmove en passant
if (p is Pawn)
{
if (source.Column != target.Column && capturedPiece == null)
{
Position pawnPosition;
if (p.Color == Color.White)
{
pawnPosition = new Position(target.Row + 1, target.Column);
}
else
{
pawnPosition = new Position(target.Row - 1, target.Column);
}
capturedPiece = _board.RemovePiece(pawnPosition);
_capturedPieces.Add(capturedPiece);
_piecesOnTheBoard.Remove(capturedPiece);
}
}
return(capturedPiece);
}