Very difficult sudoku #3517
| 5 | 9 | 1 | ||||||
| 8 | 6 | 2 | ||||||
| 2 | 5 | 7 | ||||||
| 8 | 3 | 6 | ||||||
| 2 | 1 | 9 | ||||||
| 6 | 7 | 5 | ||||||
| 9 | 5 | |||||||
| 5 | 3 | 6 | ||||||
| 3 | 7 | 4 |
Puzzle Completed
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