private static bool rookValid(Piece p, Position from, Position to)
{
int xDist = to.x - from.x;
int yDist = to.y - from.y;
if (!(xDist == 0 || yDist == 0))
{
return(false);
}
int yDirection = yDist == 0 ? 0 : yDist < 0 ? -1 : 1;
int xDirection = xDist == 0 ? 0 : xDist < 0 ? -1 : 1;
int x = from.x + xDirection;
int y = from.y + yDirection;
Position current = new Position(x, y);
while (!current.Equals(to))
{
if (!Chess.IsEmpty(current))
{
return(false);
}
current.x += xDirection;
current.y += yDirection;
}
return(!Chess.IsSame(p, to));
}
private static bool pawnValid(Piece p, Position from, Position to)
{
int xDist = from.x - to.x;
int yDist = from.y - to.y;
int direction = p.getColor() == "white" ? -1 : 1;
if (from.y + direction > 7 || from.y + direction < 0)
{
return(false);
}
if (from.y + direction != to.y && ((from.y + 2 * direction != to.y && p.getNumberOfMoves() == 0) || !Chess.IsEmpty(new Position(from.x, from.y + direction)) || p.getNumberOfMoves() > 0))
{
return(false);
}
if (xDist < -1 || xDist > 1)
{
return(false);
}
if (xDist == 0 && !Chess.IsEmpty(to))
{
return(false);
}
if (xDist * xDist == 1 && yDist * yDist != 1)
{
return(false);
}
if (xDist != 0 && (Chess.IsEmpty(to) || Chess.IsSame(p, to)))
{
return(false);
}
return(true);
}
