(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 blue square by ademjaz (on 20. January 2023, 15:42) | 42 |  97 % |
| Ravine by Jay Dyer (on 21. January 2023, 23:55) | 88 | 95 % |
| Spinning Top (Renban Whisper Sudoku) by Phistomefel (on 14. July 2025, 19:43) | 139 | 97 % |
| Blackjack by Blashyrkh (on 14. May 2023, 12:28) | 77 | 95 % |
| Emerald City by juggler (on 27. February 2025, 06:21) | 79 | 95 % |
| Rogue Knight by JnL (on 2. July 2022, 17:09) | 27 | 91 % |
| Numbered Cave Fillomino by Agent (on 27. December 2022, 09:00) | 56 | 99 % |
| vaddsetspi by zzw (on 24. September 2023, 06:41) | 32 | 98 % |
| dOUBLE tHINK by Abdul the Killer (on 9. January 2024, 12:34) | 32 | 93 % |
| Low Walls by arbitrary (on 22. May 2024, 20:39) | 59 | 96 % |
| Crossbreed by NicoD (on 7. August 2025, 05:30) | 34 | 95 % |
| Scatter Plot by Xenonetix (on 14. June 2022, 04:56) | 41 | 99 % |
| Foggy Loop (FOW) by antiknight (on 28. August 2023, 04:47) | 129 | 92 % |
| Traces by arbitrary (on 27. April 2024, 22:27) | 78 | 97 % |
| 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) | 111 | 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) | 37 | 98 % |
| Wichtel 2021 (3): Erklärnix by wichtel (on 8. July 2022, 12:20) | 15 | 100 % |
