Very difficult sudoku #1663
| 7 | 8 | 6 | 4 | |||||
| 8 | 2 | 9 | ||||||
| 6 | 5 | 8 | ||||||
| 2 | 3 | 1 | 8 | 6 | ||||
| 5 | 7 | |||||||
| 1 | ||||||||
| 6 | 8 | 3 | ||||||
| 1 | 2 | 3 | ||||||
| 7 | 2 | 1 | 9 |
Puzzle Completed
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