private void UpdateCellsAffectedBy()

in Sudoku/Board.cs [70:88]


    private void UpdateCellsAffectedBy(int sourceRow, int sourceCol, int number)
    {
      var squareBeginRow = (sourceRow / 3) * 3;
      var squareBeginCol = (sourceCol / 3) * 3;

      var squareEndRow = squareBeginRow + 3;
      var squareEndCol = squareBeginCol + 3;

      for (var row = 0; row < 9; row++)
      for (var col = 0; col < 9; col++)
      {
        if (row == sourceRow || col == sourceCol ||
            ((squareBeginRow <= row && row < squareEndRow) && (squareBeginCol <= col && col < squareEndCol)))
        {
          if (!Cell(row, col).IsFilled)
            Cell(row, col).RemoveOption(number);
        }
      }
    }