/// <summary>
/// Main logic to solve the sudoku puzzle
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public static void Solve(bool step)
{
//(row, col, possible numbers)
bool done = false;
int safety = 0;
int row = 0;
int col = 0;
Cell.SetColour(prevRow, prevCol, false);
//Cell.checkPossibleNums(row, col);
int curFilledCells = Board.filledCells;
////loop until game is done
while (done == false && safety < 1000)
{
//check possible numbers of the current Cell
for (row = 0; row < Board.kRowMax; ++row)
{
for (col = 0; col < Board.kColMax; ++col)
{
if (Board.cell[row, col].GetAnswer() == 0)
{
checkPossibleNums(row, col);
if (Board.cell[row, col].FillCell(row, col) == true)
{
Board.filledCells++;
}
//Exit from the function when one step has been calculated
if (curFilledCells != Board.filledCells && step)
{
//Cell.SetColour(row, col, true);
prevRow = row;
prevCol = col;
done = true;
break;
}
}
}
if (done == true)
{
break;
}
}
//fill in answer if its the only possible number
if (Board.filledCells >= 81)
{
done = true;
}
++safety;
}
MessageBox.Show("Number of pass throughs: " + safety);
}
