The mark of unsingle
| Solver | Solution date |
|---|---|
| SudokuExplorer | on 23. June 2021, 15:33 |
| NikolaZ | on 11. May 2021, 11:23 |
| skywalker | on 23. April 2021, 07:48 |
| karen_birgitta | on 22. April 2021, 13:43 |
| rimodech | on 16. April 2021, 10:29 |
| zorant | on 15. April 2021, 21:55 |
| marcmees | on 15. April 2021, 13:07 |
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