| 8 | 5 | 7 | 6 | 3 | 9 | 1 | 4 | 2 |
| 6 | 3 | 2 | 1 | 8 | 4 | 7 | 5 | 9 |
| 4 | 1 | 9 | 2 | 7 | 5 | 8 | 6 | 3 |
| 1 | 2 | 4 | 9 | 6 | 8 | 5 | 3 | 7 |
| 5 | 8 | 6 | 3 | 1 | 7 | 9 | 2 | 4 |
| 7 | 9 | 3 | 4 | 5 | 2 | 6 | 1 | 8 |
| 3 | 7 | 1 | 8 | 4 | 6 | 2 | 9 | 5 |
| 9 | 4 | 5 | 7 | 2 | 1 | 3 | 8 | 6 |
| 2 | 6 | 8 | 5 | 9 | 3 | 4 | 7 | 1 |
Congratulations! That's the fourth sudoku solved! Now it starts to get a little bit more tricky with the next one, number 5...