Row 8

Up to now, our strategy has been to enter all the possibles for any number with a high frequency rate within the puzzle. Now, we've got enough numbers entered into the grid that we can use a different solving strategy.

Let's look at block 3. We have seven of the nine numbers required. We are missing only the 3 and the 9. Looking at the top row, we see that it already contains a 3 (in block 2). Therefore, the 3 must go in the bottom left square of block 3 and (Eureka!) the 9 in the last remaining square.

Wow! We've come along way towards solving this puzzle.

And on further examination we see that the only number missing in column 7 is the number 2. So we can enter it in block 9.

Now you have the basic solving strategy for SuDoku puzzles. Time to try solving some on your own. Here is a selection of easy sudoku puzzles to practice on. As your skill improves, move on to the harder puzzles. Happy puzzling!