public IBoard Move(IMove move)
{
IBoard result = this.Clone() as Board;
IPiece pieceToMove = result.GetFigureAt(move.Start);
IPiece attackedPiece = result.GetFigureAt(move.Destination);
if (!AreAnyPiecesBetwen(move.Start, move.Destination))
{
if (attackedPiece == null)
{
if (pieceToMove.IsAllowedMove(move))
{
pieceToMove.Move(move.Destination);
if (!result.IsCheck(pieceToMove.color))
{
result.LastMove = move;
return(result);
}
}
else if (pieceToMove.Type == PiecesTypesEnum.Pawn && pieceToMove.IsAllowedCapture(move))
{
IPiece lastMovedPiece = result.GetFigureAt(LastMove.Destination);
if (lastMovedPiece.Type == PiecesTypesEnum.Pawn &&
LastMove.Distance() == DistanceEnum.TwoSquares &&
(LastMove.Destination.x == move.Start.x - 1 || LastMove.Destination.x == move.Start.x + 1) &&
LastMove.Destination.y == move.Start.y)
{
result.RemovePiece(lastMovedPiece);
pieceToMove.Move(move.Destination);
if (!result.IsCheck(pieceToMove.color))
{
result.LastMove = move;
return(result);
}
}
}
else if (pieceToMove.Type == PiecesTypesEnum.King)
{
IKing king = pieceToMove as IKing;
List <IMove> moves = king.Castling(move, result);
if (moves != null)
{
foreach (var item in moves)
{
result.GetFigureAt(item.Start).Move(item.Destination);
}
if (!result.IsCheck(pieceToMove.color))
{
result.LastMove = move;
return(result);
}
}
}
}
else if (attackedPiece.color != pieceToMove.color)
{
if (pieceToMove.IsAllowedCapture(move))
{
result.RemovePiece(attackedPiece);
pieceToMove.Move(move.Destination);
if (!result.IsCheck(pieceToMove.color))
{
result.LastMove = move;
return(result);
}
}
}
}
return(null);
}
