(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 | |
|---|---|---|---|
 | Redundancies by vitaminz (on 29. April 2025, 22:25) | 13 |  93 % |
| Theseus and the Minotaur by juggler (on 31. May 2025, 10:53) | 49 | 93 % |
| Focus on Symmetry 2 by Mad-Tyas (on 19. August 2025, 20:17) | 77 | 94 % |
| Doppel Peas in a Pod by ralphwaldo1 (on 7. November 2025, 01:27) | 18 | 91 % |
| 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) | 14 | 90 % |
| Lumos Maxima by chameleon (on 5. October 2022, 16:10) | 616 | 94 % |
| Boundaries by Playmaker6174 (on 16. November 2024, 02:00) | 89 | 96 % |
| 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 % |
| Galaxy Killer Sudoku by Phistomefel (on 11. May 2020, 11:33) | 108 | 96 % |
| Life on 36 cells by Phistomefel (on 13. January 2021, 00:42) | 104 | 95 % |
| Hurray for René by Richard (on 9. January 2021, 00:00) | 53 | 96 % |
| Knights & Archers hold the Line by Florian Wortmann (on 30. January 2022, 14:54) | 101 | 96 % |
| Baby Dragon by zetamath (on 18. November 2022, 17:23) | 156 | 96 % |
| Qaak (Quattroquadri/Anti-diagonal/Arrow/Killer) by dumediat (on 24. August 2024, 15:50) | 48 | 95 % |
| Sum Fillomino by AnalyticalNinja (on 10. September 2024, 18:10) | 97 | 98 % |
| 1001-Nacht-Rundwege aus Paralleluniversen by ibag (on 4. November 2013, 05:55) | 35 | 99 % |
| Memory Loss by Joseph nehme (on 25. December 2021, 10:45) | 40 | 92 % |
| Coriolis (Lockout X)(Tallcat and Twototenth Collab) by tallcat (on 30. January 2022, 20:56) | 45 | 95 % |
