Difficult sudoku #2393
| 3 | 4 | 7 | 9 | |||||
| 5 | 7 | 2 | 3 | 8 | ||||
| 4 | 1 | 2 | 5 | |||||
| 8 | 9 | 3 | 5 | 1 | 4 | |||
| 2 | 7 | |||||||
| 5 | 8 | |||||||
| 5 | 9 | 2 | ||||||
| 4 | 1 | 8 | 9 | |||||
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