(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 | |
|---|---|---|---|
 | Fortress at Midnight by Playmaker6174 (on 10. November 2021, 23:35) | 35 |  93 % |
| King's Guard by Fafrd (on 6. June 2022, 03:49) | 37 | 95 % |
| The Prophecy (Zippular Lines #1) by heliopolix (on 15. December 2023, 00:43) | 32 | 95 % |
| Do Androids Dream of Electric Sheep? by Abdul the Killer (on 21. May 2024, 12:34) | 75 | 99 % |
| 2. Teil der Trilogie: Ein schwangeres Hitori by berni (on 29. September 2010, 01:23) | 59 | 97 % |
| Sandwich Counts by RockyRoer (on 4. April 2023, 22:21) | 47 | 96 % |
| Pac-Man Sudoku by mathpesto (on 10. June 2023, 04:50) | 125 | 94 % |
| Leapfrog Sudoku by stephane.bura (on 3. December 2020, 20:00) | 18 | 97 % |
| Rolling Snowballs by Nordy (on 7. December 2021, 22:11) | 20 | 90 % |
| Twenty-four and what? by andreasv (on 8. March 2022, 07:37) | 24 | 92 % |
| Skyline by FinnishGuy (on 6. May 2022, 22:24) | 18 | 92 % |
| Sum Killer Between Us by XeonRisq (on 4. July 2022, 17:00) | 41 | 96 % |
| Was it a car or a cat I saw? by Angelo (on 20. July 2022, 21:23) | 19 | 98 % |
| Campsite #3 by PrimeWeasel (on 24. January 2023, 20:40) | 17 | 97 % |
| Hybrid Star Battle Series (019) - Chiaroscuro by BenceJoful (on 17. May 2023, 03:02) | 19 | 95 % |
| Wichtel 2022 (8): Kornkreis auf dem Acker by wichtel (on 25. October 2023, 15:15) | 20 | 94 % |
| Po-Boy by Sniglett (on 1. December 2023, 14:06) | 19 | 95 % |
| Double Squished by Prof.Dori (on 14. December 2023, 01:57) | 18 | 94 % |
| Pam Li arrow or rail map? by palpot (on 31. January 2024, 17:38) | 28 | 93 % |
| J.O.E. by JayForty (on 7. February 2024, 14:42) | 84 | 97 % |
