(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 | |
|---|---|---|---|
 | vaddsetspi by zzw (on 24. September 2023, 06:41) | 32 |  98 % |
| Low Walls by arbitrary (on 22. May 2024, 20:39) | 59 | 96 % |
| Yin Yang U-Bahn [Secret Satan #1] by Christounet (on 3. January 2025, 13:50) | 26 | 100 % |
| Crossbreed by NicoD (on 7. August 2025, 05:30) | 34 | 95 % |
| Atrocious Destruction by NXTMaster (on 14. November 2025, 00:00) | 29 | 98 % |
| Spinning Top (Renban Whisper Sudoku) by Phistomefel (on 14. July 2025, 19:43) | 141 | 97 % |
| Wichtelkalender 2013 – September by Susie (on 1. September 2013, 00:00) | 42 | 91 % |
| Scatter Plot by Xenonetix (on 14. June 2022, 04:56) | 43 | 99 % |
| The blue square by ademjaz (on 20. January 2023, 15:42) | 43 | 97 % |
| Foggy Loop (FOW) by antiknight (on 28. August 2023, 04:47) | 133 | 92 % |
| Roller Coaster mit Extras 19 by Uhu (on 17. July 2020, 08:45) | 28 | 96 % |
| Mystery Killer by Phistomefel (on 22. July 2020, 20:43) | 112 | 93 % |
| Panorama by Mark Sweep (on 24. March 2021, 22:19) | 14 | 96 % |
| X-Repeat Fillomino by MagnusJosefsson (on 21. May 2021, 13:45) | 45 | 100 % |
| QR Code by Ore (on 20. June 2022, 00:00) | 38 | 98 % |
| Imperfect Flower (Run-on Renbans) by AnalyticalNinja (on 6. October 2022, 23:06) | 29 | 95 % |
| Chaos Construction 1 (Little Killer) by Jeet Sampat (on 21. December 2022, 17:33) | 32 | 96 % |
| Pink Poison by Die Hard (on 23. July 2023, 07:53) | 31 | 92 % |
| Missing Lines by Chad (on 13. August 2023, 15:56) | 16 | 92 % |
| dOUBLE tHINK by Abdul the Killer (on 9. January 2024, 12:34) | 34 | 94 % |
