public static byte[,] AsCopyWithUpdate(this byte[,] squares, int x, int y, byte val)
{
var tmp = squares.AsCopy();
tmp[x, y] = val;
return(tmp);
}
public static byte[,] Untransform(this byte[,] squares, Direction direction)
{
switch (direction)
{
case Direction.Down: return(squares.Invert().Transpose());
case Direction.Up: return(squares.Flip().Transpose());
case Direction.Left: return(squares.AsCopy());
case Direction.Right: return(squares.Invert());
}
throw new Exception("Oops");
}