(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 | |
|---|---|---|---|
 | Archer's Entropy 2: Protection by Mad-Tyas (on 6. April 2022, 16:56) | 37 |  93 % |
| Anti-7 Arrows by ademjaz (on 31. January 2024, 09:25) | 42 | 95 % |
| It Makes No Difference by juggler (on 19. August 2024, 11:37) | 39 | 94 % |
| Emerald City by juggler (on 27. February 2025, 06:21) | 42 | 97 % |
| Zwei Rundwege by Calavera (on 30. July 2009, 15:14) | 75 | 98 % |
| RPG - The Enigma Trio by Playmaker6174 (on 24. December 2021, 16:30) | 39 | 96 % |
| Kropki Chaos by mathpesto (on 23. January 2022, 04:19) | 75 | 97 % |
| Sisyphos Fillomino (10x10) by Jesper (on 14. November 2022, 15:00) | 37 | 100 % |
| Pathological by arbitrary (on 7. June 2024, 12:52) | 40 | 91 % |
| Adventskalender 2018 (Teil 23) - Yajilin by Zzzyxas (on 23. December 2018, 07:00) | 75 | 94 % |
| Flaemmchen-Sudoku mit Einmischung der Außerirdischen by ibag (on 2. August 2013, 05:30) | 36 | 98 % |
| Paintball battle by Joseph nehme (on 26. December 2020, 18:04) | 42 | 96 % |
| Wichtel 2018 (6): In der Wichtelbäckerei by wichtel (on 9. December 2019, 01:28) | 39 | 100 % |
| Three Out of Four Ain't Bad by Big Tiger (on 12. July 2020, 22:00) | 38 | 95 % |
| 6x6 wrogn CC by lerroyy (on 6. June 2022, 00:07) | 40 | 94 % |
| Richmond (Killer Diagonal) by tallcat (on 13. December 2022, 18:03) | 86 | 97 % |
| Lying Japanese Cavescraper Ring by KNT (on 15. December 2022, 03:02) | 40 | 99 % |
| Compass Fillomino #2 by MagnusJosefsson (on 8. April 2021, 18:35) | 45 | 97 % |
| Renban Arrow sudoku by udukos (on 2. June 2021, 22:13) | 41 | 96 % |
| Bicycles by SirSchmoopy (on 27. September 2021, 05:19) | 40 | 98 % |
