(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 | |
|---|---|---|---|
 | Duplexity by Sotehr (on 9. December 2024, 02:00) | 43 |  96 % |
| Skropki Dots 17 by Christounet (on 24. December 2024, 09:46) | 22 | 99 % |
| Some Things Fogn by pdyxs (on 8. February 2025, 04:53) | 56 | 90 % |
| GPS Signal Lost by ChinStrap (on 16. February 2025, 18:31) | 22 | 96 % |
| Spiralling quadkis by Lorena (on 20. February 2025, 21:27) | 20 | 95 % |
| Into the arrowverse by DedaKosta (on 24. April 2025, 15:08) | 20 | 93 % |
| Theseus and the Minotaur by juggler (on 31. May 2025, 10:53) | 50 | 93 % |
| The lost oriel by NicoD (on 30. May 2025, 05:30) | 31 | 93 % |
| Focus on Symmetry 2 by Mad-Tyas (on 19. August 2025, 20:17) | 77 | 94 % |
| The Knight's Battle Axe by masetab (on 15. November 2025, 04:52) | 49 | 94 % |
| Every 1 sees two 2s and three 3s by Lutterot (on 26. November 2025, 18:54) | 18 | 92 % |
| Cantor´s Blue by mateo99 (on 29. December 2025, 13:56) | 15 | 90 % |
| Hammerhead by cygne (on 7. January 2026, 17:29) | 58 | 95 % |
| Uniqueness, with a Nudge by rmulinix (on 3. February 2026, 20:45) | 29 | 95 % |
| Lumos Maxima by chameleon (on 5. October 2022, 16:10) | 621 | 94 % |
| Knights & Archers hold the Line by Florian Wortmann (on 30. January 2022, 14:54) | 103 | 97 % |
| Boundaries by Playmaker6174 (on 16. November 2024, 02:00) | 89 | 96 % |
| Scylla (Killer Sudoku) by Phistomefel (on 8. September 2025, 22:41) | 147 | 94 % |
| Quadrupelblock für Gabi by pin7guin (on 9. July 2015, 21:56) | 48 | 96 % |
| Renban Skyscrapers (CTC 400k subscribers) by Florian Wortmann (on 3. October 2021, 12:42) | 51 | 91 % |
