(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 | |
|---|---|---|---|
 | Wrapping Paper on Boxing Day by twototenth (on 28. December 2021, 08:00) | 36 |  97 % |
| Dr. Sudoku by Hecspeed (on 9. September 2022, 08:28) | 27 | 98 % |
| Zeta and Kappa by twototenth (on 18. October 2022, 08:00) | 33 | 96 % |
| Diagonalization (Partial CC) by the_cogito (on 31. July 2023, 15:45) | 31 | 98 % |
| Shrug by dennischen (on 20. July 2024, 08:48) | 38 | 98 % |
| HERBST - Buchstabenrätsel / Letter Puzzle by DocLogic (on 28. October 2024, 10:10) | 27 | 97 % |
| Leaving Las Vegas by SkepticalMario (on 16. November 2024, 00:13) | 38 | 93 % |
| Two Times a Killer by EnPee (on 2. January 2025, 00:12) | 27 | 91 % |
| Entropy miracle 3 by fractalminding (on 27. January 2026, 09:59) | 68 | 93 % |
| Skymania: Wolkenkratzer-Hanidoku by Pyrrhon (on 18. September 2009, 12:29) | 63 | 92 % |
| Mannlzeug: Neinerlaa by Pyrrhon (on 24. December 2009, 18:00) | 43 | 90 % |
| Little Antiking Killer by PrimeWeasel (on 10. November 2020, 15:58) | 23 | 97 % |
| ThermoXidil by fritzdis (on 17. March 2021, 04:48) | 46 | 93 % |
| 3D Tapa - Count to Five by athin (on 25. June 2021, 12:00) | 17 | 98 % |
| Qnight by tsc (on 23. October 2021, 10:13) | 47 | 97 % |
| Two Wheeler by gtkrouwel (on 29. October 2021, 12:29) | 26 | 94 % |
| Roadmap by vidarino (on 14. November 2021, 19:21) | 22 | 97 % |
| Just Arrows! by Jeet Sampat (on 23. January 2022, 00:41) | 21 | 96 % |
| ew by mathpesto (on 26. June 2022, 18:28) | 68 | 96 % |
| BTNCA by ICHTUES (on 3. July 2022, 06:00) | 47 | 96 % |
