Very difficult sudoku #637
| 8 | 1 | 4 | ||||||
| 7 | 4 | 8 | 3 | |||||
| 5 | 3 | 2 | ||||||
| 6 | 9 | 7 | ||||||
| 4 | 7 | 2 | ||||||
| 8 | 3 | |||||||
| 5 | 6 | 2 | ||||||
| 4 | ||||||||
| 9 | 2 | 6 | 7 |
Puzzle Completed
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