Archived Challenging puzzle Thursday 13th August 2026 [7678]
| a | b | c | d | e | f | g | h | i | |
| A | 4 | ||||||||
| B | 3 | 1 | 9 | 4 | 7 | ||||
| C | 3 | 2 | |||||||
| D | 4 | 7 | 8 | 1 | |||||
| E | 1 | 2 | 6 | 5 | 9 | 7 | 8 | 4 | |
| F | 8 | 6 | 4 | 9 | |||||
| G | 1 | 6 | |||||||
| H | 6 | 9 | 1 | 8 | 5 | ||||
| I | 5 |
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