-------------------------------------
| 4   6   5 | 8   3   1 | 2   7   9 |
| 7   8   2 | 4   9   6 | 3   1   5 |
| 1   3   9 | 5   7   2 | 4   6   8 |
-------------------------------------
| 6   9   4 | 1   2   5 | 8   3   7 |
| 3   2   8 | 6   4   7 | 5   9   1 |
| 5   1   7 | 9   8   3 | 6   4   2 |
-------------------------------------
| 8   4   1 | 2   6   9 | 7   5   3 |
| 2   5   3 | 7   1   4 | 9   8   6 |
| 9   7   6 | 3   5   8 | 1   2   4 |
-------------------------------------