public bool TryAndSolveOnce(SudokuGrid inputGrid)
{
while (inputGrid.FindAllEmptySquares().Count != 0)
{
bool hasASquareBeenFilled = false;
foreach (var emptySquare in inputGrid.FindAllEmptySquares())
{
List <int> validOptionsForSquare = DetermineValidOptionsForSquare(emptySquare, inputGrid);
if (validOptionsForSquare.Count == 0)
{
return(false);
}
if (validOptionsForSquare.Count == 1)
{
inputGrid.FillInSquare(emptySquare, validOptionsForSquare[0]);
hasASquareBeenFilled = true;
}
}
if (!hasASquareBeenFilled)
{
return(true);
}
}
return(true);
}
public bool TryAndSolveOnce(SudokuGrid inputGrid)
{
while (inputGrid.FindAllEmptySquares().Count != 0)
{
bool hasASquareBeenFilled = false;
foreach (var emptySquare in inputGrid.FindAllEmptySquares())
{
List<int> validOptionsForSquare = DetermineValidOptionsForSquare(emptySquare, inputGrid);
if (validOptionsForSquare.Count == 0)
{
return false;
}
if (validOptionsForSquare.Count == 1)
{
inputGrid.FillInSquare(emptySquare, validOptionsForSquare[0]);
hasASquareBeenFilled = true;
}
}
if (!hasASquareBeenFilled)
{
return true;
}
}
return true;
}
