Very difficult sudoku #3215
| 6 | ||||||||
| 7 | 9 | 8 | ||||||
| 4 | 1 | 6 | 7 | |||||
| 2 | ||||||||
| 3 | 6 | 4 | ||||||
| 8 | 5 | 3 | ||||||
| 4 | 7 | 5 | 9 | |||||
| 1 | 6 | |||||||
| 3 | 1 | 7 |
Puzzle Completed
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