(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 | |
|---|---|---|---|
 | the compeationist by aqjhs (on 5. June 2025, 05:28) | 36 |  96 % |
| Balanced Ride (Roller Coaster/Cave) by Piatato (on 23. October 2023, 11:00) | 41 | 99 % |
| Shade Your Own Puzzle: Fillomino vs Cave ft. Parity #3 - N difference (13x13) by Playmaker6174 (on 4. January 2025, 03:30) | 46 | 99 % |
| Antiking Killer Sudoku by PotatoHead21 (on 1. February 2023, 13:00) | 14 | 90 % |
| Copycat Copycat by Scojo (on 24. June 2023, 04:05) | 23 | 100 % |
| Checkered Slitherlink by KNT (on 18. June 2024, 03:12) | 39 | 97 % |
| Yajilominous by Nell Gwyn (on 16. March 2025, 18:25) | 36 | 98 % |
| Schrödinger Lines Pt.2 by Zanno (on 20. March 2025, 15:11) | 12 | 93 % |
| zuul (w/ aqjhs) by ThePedallingPianist (on 31. October 2025, 10:31) | 28 | 93 % |
| Wheel of Fortune (Entropy) by Mad-Tyas (on 26. September 2023, 12:52) | 78 | 96 % |
| Japanese Ranking by KNT (on 11. June 2024, 21:18) | 62 | 99 % |
| Vault Construction by the_cogito (on 12. July 2022, 16:43) | 57 | 98 % |
| Crypto Crypto Japanese Cave by KNT (on 29. December 2022, 18:27) | 40 | 98 % |
| Nagaraja [Japanese Sums Cipher Snake Deconstruction] by Christounet (on 12. April 2024, 21:38) | 40 | 98 % |
| Shindig Redone 2 (Anti-Knight, Renban) by juddimal (on 18. April 2025, 07:09) | 44 | 95 % |
| Arrow Laboratory by PotatoHead21 (on 20. January 2023, 15:12) | 31 | 96 % |
| Crab Net (with Math Pesto) by Paletron (on 29. October 2024, 11:42) | 32 | 96 % |
| Fourteen (Killer Sudoku) by FryTheGuy (on 8. August 2021, 08:13) | 78 | 99 % |
| Killer Turm by tuace (on 17. November 2013, 09:30) | 46 | 98 % |
| Slingshot Fillomino by Jesper (on 15. September 2020, 08:38) | 43 | 99 % |
