Very difficult sudoku #509
| 5 | 9 | 3 | ||||||
| 6 | 5 | |||||||
| 7 | 1 | |||||||
| 8 | ||||||||
| 5 | 9 | 6 | 1 | |||||
| 4 | 1 | 8 | ||||||
| 7 | 8 | |||||||
| 9 | 4 | 5 | 6 | |||||
| 4 | 6 | 2 |
Puzzle Completed
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