Very difficult sudoku #1213
| 1 | 8 | 7 | ||||||
| 3 | 6 | |||||||
| 6 | 8 | |||||||
| 5 | 1 | 7 | ||||||
| 6 | 7 | 1 | 9 | |||||
| 4 | 2 | |||||||
| 7 | 9 | 3 | 5 | |||||
| 4 | 6 | 1 | ||||||
Puzzle Completed
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