public bool IsValidMove(Chessboard board, Tuple <int, int> position)
{
int YDiff = this.Position.Item1 - position.Item1;
int XDiff = this.Position.Item2 - position.Item2;
if (XDiff != 0 && YDiff != 0 && Math.Abs((float)XDiff / (float)YDiff) == 1)
{
if (board.GetPiece(position) != null && board.GetPiece(position).Color == this.Color)
{
return(false);
}
if (XDiff > 0)
{
if (YDiff > 0)
{
for (int i = 1; i < Math.Abs(XDiff); i++)
{
if (board.GetPiece(new Tuple <int, int>(this.Position.Item1 - i, this.Position.Item2 - i)) != null)
{
return(false);
}
}
}
else
{
for (int i = 1; i < Math.Abs(XDiff); i++)
{
if (board.GetPiece(new Tuple <int, int>(this.Position.Item1 + i, this.Position.Item2 - i)) != null)
{
return(false);
}
}
}
}
else
{
if (YDiff > 0)
{
for (int i = 1; i < Math.Abs(XDiff); i++)
{
if (board.GetPiece(new Tuple <int, int>(this.Position.Item1 - i, this.Position.Item2 + i)) != null)
{
return(false);
}
}
}
else
{
for (int i = 1; i < Math.Abs(XDiff); i++)
{
if (board.GetPiece(new Tuple <int, int>(this.Position.Item1 + i, this.Position.Item2 + i)) != null)
{
return(false);
}
}
}
}
return(true);
}
return(false);
}
// Implement IMoveable interface in Bishop.cs
public bool IsChecking(Chessboard board, King king)
{
return(IsValidMove(board, king.Position));
}