private List <int>[,] FindValidValues(Board board)
{
List <int>[,] possibleValues = new List <int> [Board.Size, Board.Size];
Fill2DArrayWithRange(possibleValues, 1, Board.Size);
for (int x = 0; x < Board.Size; x++)
{
for (int y = 0; y < Board.Size; y++)
{
int value = board.Get(new Point(x, y));
if (value != 0)
{
possibleValues[y, x].Clear();
RemoveValueFromRow(possibleValues, y, value);
RemoveValueFromCollumn(possibleValues, x, value);
RemoveValueFromArea(possibleValues, board.GetAreaStartPointFromPointOnBoard(new Point(x, y)), value);
}
}
}
return(possibleValues);
}