(Very) Hard AND nice puzzles
The following list contains portal puzzles that have been rated as nice or very nice and that are difficult. These puzzles are recommended for experts - and allow some time to solve.
| Description | solved | Rating | |
|---|---|---|---|
 | Maelstrom by MavericksJD (on 2. June 2023, 02:07) | 33 |  92 % |
| No Mountains Allowed by Laake (on 19. November 2023, 23:52) | 17 | 94 % |
| Arrows to the gates of hell by damasosos92 (on 6. February 2024, 23:17) | 13 | 96 % |
| Regionometers by ThePedallingPianist (on 20. February 2024, 13:20) | 30 | 96 % |
| DoubleX-somedoku by sanabas (on 22. July 2024, 09:14) | 15 | 90 % |
| City Within City by Lyun Licuss (on 26. September 2025, 13:04) | 18 | 90 % |
| Peaceful Destruction by NXTMaster (on 21. November 2025, 00:00) | 19 | 100 % |
| Balanced Chaos by fritzdis (on 29. November 2022, 16:24) | 121 | 97 % |
| Japanese Cave by KNT (on 29. August 2022, 05:29) | 49 | 99 % |
| Caged Knights Versus The Archers by Jeet Sampat (on 16. May 2023, 18:33) | 42 | 97 % |
| Entropy Antimatter by Mad-Tyas (on 5. March 2024, 16:24) | 38 | 93 % |
| Sunset Cave by wooferzfg (on 4. May 2025, 08:37) | 39 | 93 % |
| Indexed Chaos by Jay Dyer (on 3. September 2022, 23:42) | 81 | 100 % |
| Lawful Wrogn by Niverio (on 20. March 2023, 16:33) | 84 | 95 % |
| Chaos Construction by Phistomefel (on 21. April 2020, 00:27) | 159 | 97 % |
| Roller Coaster mit Extras 5 by Uhu (on 11. March 2018, 13:50) | 63 | 99 % |
| Killer Sudoku(003) by cdwg2000 (on 4. September 2020, 01:04) | 53 | 98 % |
| Gabe Ruth hits a homerun by SirWoezel (on 28. April 2021, 18:49) | 29 | 96 % |
| Cycle (Between lines sudoku) by Lizzy01 (on 8. September 2021, 10:45) | 21 | 97 % |
| Schrodinger's Split Peas by SamuPiano (on 12. July 2024, 15:44) | 42 | 97 % |
