_______________________________         _______________________________
| 3  .  . | 6  .  . | 8  1  . |         | .  .  7 | .  .  2 | 1  .  4 |
| .  .  5 | .  .  . | 4  2  7 |         | 1  .  . | .  .  . | .  .  . |
| 7  .  1 | 8  .  . | .  .  . |         | .  .  5 | .  9  . | 6  7  . |
_______________________________         _______________________________
| 1  .  . | .  .  . | .  .  3 |         | 9  .  8 | .  4  . | 5  .  7 |
| .  .  2 | 3  .  8 | 6  .  9 |         | .  7  . | 6  .  . | .  .  . |
| .  .  . | .  9  5 | .  .  4 |         | .  .  . | 7  8  . | .  .  . |
_______________________________________________________________________
| 4  .  3 | 1  .  . | .  .  . | .  3  . | .  .  . | .  3  . | .  5  1 |
| .  .  . | .  7  . | .  .  . | .  .  4 | .  .  . | .  .  . | .  3  6 |
| .  7  . | 5  .  . | .  .  . | 2  .  . | .  .  . | 8  1  7 | .  2  . |
_______________________________________________________________________
                    | .  9  . | .  8  . | 1  .  . |
                    | .  .  . | .  .  . | .  .  . |
                    | .  .  7 | .  1  . | .  6  . |
_______________________________________________________________________
| .  2  . | 8  3  9 | .  .  . | .  .  6 | .  .  . | .  .  6 | .  5  . |
| 9  5  . | .  .  . | .  .  . | 1  .  . | .  .  . | .  2  . | .  .  . |
| 4  3  . | .  7  . | .  .  . | .  4  . | .  .  . | .  .  9 | 2  .  7 |
_______________________________________________________________________
| .  .  . | .  8  5 | .  .  . |         | 2  .  . | 9  3  . | .  .  . |
| .  .  . | .  .  3 | .  2  . |         | 5  .  8 | 7  .  4 | 6  .  . |
| 5  .  4 | .  2  . | 8  .  1 |         | 1  .  . | .  .  . | .  .  4 |
_______________________________         _______________________________
| .  8  7 | .  1  . | 5  .  . |         | .  .  . | .  .  2 | 4  .  6 |
| .  .  . | .  .  . | .  .  2 |         | 7  1  6 | .  .  . | 5  .  . |
| 1  .  3 | 6  .  . | 7  .  . |         | .  4  2 | .  .  1 | .  .  3 |
_______________________________         _______________________________