private bool MakeRec(int difficult, ref Sudoku puzzle)
{
var cou = 0;
foreach (var elem in puzzle.Matrix)
{
if (elem == 0)
{
cou++;
}
}
/*Console.WriteLine(cou);*/
if (difficult == cou)
{
return(true);
}
else
{
var iter = Size;
while (true)
{
if (iter == 0)
{
break;
}
int rem;
while (true)
{
rem = rnd.Next(0, Size * Size * Size * Size);
if (puzzle.Matrix[rem] != 0)
{
break;
}
}
iter--;
/* Console.WriteLine(rem);*/
puzzle.Matrix[rem] = 0;
if (Recursive.IsSolutionOlnyOne(puzzle))
{
if (MakeRec(difficult, ref puzzle))
{
return(true);
}
}
else
{
return(false);
}
}
return(false);
}
}
public List <int> Solve(List <int> input)
{
return(Recursive.Solve(new Sudoku(input.ToArray())).Matrix);
}