Fortress Sudoku- 2019 China Undergraduate Sudoku Championship Leftover
| Solver | Solution date |
|---|---|
| zrbakhtiar | on 24. February 2023, 19:27 |
| Crul | on 15. March 2022, 22:16 |
| Raistlen | on 25. September 2021, 14:54 |
| ParaNox | on 17. August 2021, 09:00 |
| misko | on 17. May 2021, 09:26 |
| juventino188 | on 11. March 2021, 18:24 |
| Ours brun | on 23. January 2021, 11:40 |
| DukeBG | on 8. January 2021, 21:27 |
| HolyFracker | on 26. November 2020, 08:42 |
| Thomster | on 15. November 2020, 14:09 |
| Snowhare | on 23. July 2020, 11:54 |
| keelyc27 | on 20. June 2020, 22:17 |
| Physch | on 11. June 2020, 16:48 |
| Richard | on 6. June 2020, 15:38 |
| Errorandy | on 1. May 2020, 19:58 |
| zhergan | on 23. April 2020, 02:21 |
| Joo M.Y | on 23. April 2020, 01:09 |
| ildiko | on 22. April 2020, 21:38 |
| NikolaZ | on 1. April 2020, 23:37 |
| tamz29 | on 20. March 2020, 23:17 |
| Mars | on 18. March 2020, 22:17 |
| pin7guin | on 18. March 2020, 17:56 |
| zuzanina | on 3. March 2020, 18:31 |
| ffricke | on 23. February 2020, 20:49 |
| CHalb | on 13. February 2020, 18:38 |
| Feadoor | on 12. February 2020, 21:18 |
| Luigi | on 7. February 2020, 12:05 |
| Joe Average | on 2. February 2020, 01:34 |
| bob | on 1. February 2020, 20:22 |
| sf2l | on 29. January 2020, 06:52 |
| Realshaggy | on 15. January 2020, 00:06 |
| HaSe | on 11. January 2020, 16:40 |
| jessica6 | on 9. January 2020, 12:03 |
| jirk | on 8. January 2020, 20:51 |
| Hasenvogel | on 8. January 2020, 15:35 |
| swotty | on 8. January 2020, 12:33 |
| rcg | on 7. January 2020, 10:46 |
| Carolin | on 6. January 2020, 21:33 |
| lutzreimer | on 6. January 2020, 16:54 |
| pokerke | on 5. January 2020, 22:42 |
| sandmoppe | on 5. January 2020, 10:53 |
| mango | on 5. January 2020, 00:23 |
| Kekes | on 4. January 2020, 23:39 |
| Tahg | on 4. January 2020, 23:36 |
| Alex | on 4. January 2020, 18:40 |
| moss | on 4. January 2020, 16:56 |
| adam001 | on 4. January 2020, 15:49 |
| KlausRG | on 4. January 2020, 15:44 |
| marsigel | on 4. January 2020, 10:51 |
| AnnaTh | on 4. January 2020, 07:41 |
| Zzzyxas | on 4. January 2020, 01:33 |
| rimodech | on 3. January 2020, 23:27 |
| Uhu | on 3. January 2020, 21:56 |
| WAW | on 3. January 2020, 20:47 |
| Paxed | on 3. January 2020, 15:48 |
| tuace | on 3. January 2020, 14:38 |
| derwolf23 | on 3. January 2020, 10:59 |
| saskia-daniela | on 3. January 2020, 10:32 |
| Statistica | on 3. January 2020, 08:39 |
| ropeko | on 3. January 2020, 08:24 |
| cdwg2000 | on 2. January 2020, 23:55 |
| ManuH | on 2. January 2020, 23:30 |
| zorant | on 2. January 2020, 23:30 |
| skywalker | on 2. January 2020, 22:38 |
| dm_litv | on 2. January 2020, 21:31 |
| Matt | on 2. January 2020, 21:09 |
| cornuto | on 2. January 2020, 21:01 |
| geronimo92 | on 2. January 2020, 18:40 |
| Julianl | on 2. January 2020, 18:21 |
| 111chrisi | on 2. January 2020, 18:21 |
| Mody | on 2. January 2020, 17:10 |
| flaemmchen | on 2. January 2020, 16:46 |
| Rollo | on 2. January 2020, 16:43 |
| ch1983 | on 2. January 2020, 16:09 |
| Nothere | on 2. January 2020, 16:03 |
| marcmees | on 2. January 2020, 15:56 |
| r45 | on 2. January 2020, 15:49 |
| Dandelo | on 2. January 2020, 14:58 |
| qw014052 | on 2. January 2020, 14:42 |
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