Very difficult sudoku #1519
| 5 | 7 | 3 | ||||||
| 2 | 1 | 6 | 7 | |||||
| 6 | 5 | 3 | 1 | |||||
| 4 | ||||||||
| 2 | 7 | 6 | 9 | 8 | 4 | |||
| 6 | ||||||||
| 8 | 3 | 6 | 9 | |||||
| 4 | 7 | 8 | 6 | |||||
| 2 | 4 | 8 |
Puzzle Completed
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