private static bool CheckSeveralMissingColumn(GridSquareScript selection, GridSquareScript[] gridSquares)
{
int col = GridMaths.ColumnForSquare(selection.Index);
GridSquareScript[] emptyColSquares = EmptyGridsAtIndexes(GridMaths.GridColumnIndices(col), gridSquares, selection);
int[] emptyIndices = emptyColSquares.Select(x => x.Index).Distinct().ToArray();
int[] bigSquareIndices = emptyColSquares.Select(x => GridMaths.BigSquareForSquare(x.Index)).Distinct().ToArray();
List <int> usableSquares = new List <int>();
for (int i = 0; i < bigSquareIndices.Length; i++)
{
int box = bigSquareIndices[i];
if (!DoesBigSquareContainNumber(box, selection, gridSquares))
{
int[] checks = emptyIndices.Intersect(GridMaths.GridColumnInSquare(col, box)).ToArray();
if (checks.Length > 0)
{
usableSquares.AddRange(checks);
}
}
}
if (usableSquares.Count > 0)
{
return(usableSquares.All(x => DoesRowContainNumber(GridMaths.RowForSquare(x), selection, gridSquares)));
}
return(true);
}
private static bool DoesColumnInSquareHaveSpace(int col, int square, int index, GridSquareScript[] gridSquares)
{
GridSquareScript[] colInSquareSquares = GridsAtIndexes(GridMaths.GridColumnInSquare(col, square), gridSquares);
return(colInSquareSquares.Any(x => x.Number == 0 && !x.IsTarget)); //x.Index != index);
}
