(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 | |
|---|---|---|---|
 | Panorama by Mark Sweep (on 24. March 2021, 22:19) | 13 |  96 % |
| SandwichScrapers v2 by cfop (on 26. August 2021, 19:45) | 15 | 94 % |
| Illithid by PulverizingPancake (on 15. September 2021, 05:53) | 57 | 97 % |
| Multi-color Madness! by esotericVideos (on 17. November 2021, 06:02) | 26 | 96 % |
| Harmony by Playmaker6174 (on 3. June 2022, 17:30) | 42 | 97 % |
| Descending Madness 4 (Ambiguous Combination Constraint Arrows) by AnalyticalNinja (on 17. June 2022, 18:45) | 15 | 96 % |
| Wichtel 2021 (3): Erklärnix by wichtel (on 8. July 2022, 12:20) | 14 | 100 % |
| Pink Poison by Die Hard (on 23. July 2023, 07:53) | 29 | 92 % |
| Missing Lines by Chad (on 13. August 2023, 15:56) | 15 | 92 % |
| Baby Steps by antiknight (on 7. November 2023, 23:38) | 64 | 94 % |
| Little Killer Irrwisch Sudoku by clover (on 23. December 2023, 15:53) | 13 | 94 % |
| Fogrotto by mathpesto (on 17. December 2022, 15:29) | 180 | 96 % |
| Glass Half Summed (Chaos Construction) by sfushidahardy (on 25. August 2024, 01:10) | 55 | 100 % |
| The Answer to the Ultimate Question by ViKingPrime (on 11. October 2024, 20:30) | 62 | 97 % |
| Whispering Arrows by abed hawila (on 9. July 2021, 06:00) | 31 | 97 % |
| Archa by zetamath (on 10. January 2022, 06:28) | 89 | 100 % |
| Orb 4: It's All Gone Wrogn! by DiMono (on 14. June 2022, 20:32) | 28 | 99 % |
| Cross the Sums by abed hawila (on 13. March 2023, 12:56) | 62 | 97 % |
| Slingshot Skirmish 5 - Siege Tactics by Allagem (on 10. May 2024, 13:37) | 30 | 95 % |
| Deconstruction: X-Sums by Jesper (on 21. March 2022, 10:26) | 106 | 100 % |
