Difficult sudoku #2810
| 5 | 2 | 9 | ||||||
| 4 | 8 | 5 | 3 | 6 | ||||
| 9 | 6 | 4 | 5 | |||||
| 3 | 4 | 5 | ||||||
| 5 | 2 | |||||||
| 1 | 8 | 9 | ||||||
| 9 | 6 | |||||||
| 4 | 8 | 6 | ||||||
| 4 | 1 |
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