(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 | |
|---|---|---|---|
 | Impossible Objects by tesseralis (on 8. September 2023, 07:40) | 35 |  98 % |
| Compass Fillomino #5: Large Ring by MagnusJosefsson (on 3. September 2021, 10:59) | 34 | 97 % |
| Hey, Are You Awake? by mathpesto (on 7. August 2022, 22:06) | 34 | 97 % |
| Toutatis by IcyFruit (on 9. May 2024, 14:35) | 35 | 92 % |
| Verspäteter Geburtstagsgruß aus dem All by ibag (on 27. June 2019, 00:00) | 26 | 99 % |
| Aim for the Sky by udukos (on 28. March 2021, 22:12) | 30 | 98 % |
| Projections (Killer Parity) by tallcat (on 12. November 2022, 08:00) | 31 | 96 % |
| Ziemlich japanische Summen mit Irrwisch by ibag (on 10. June 2017, 10:00) | 27 | 99 % |
| Paulas Geheimschrift-Rundweg-Puzzle by CJK (on 19. April 2021, 10:27) | 25 | 100 % |
| Hawaii (Spiral Galaxy Sudoku) by PjotrV (on 5. February 2022, 15:04) | 57 | 97 % |
| Chaos Construction: Region Sums by KNT (on 7. April 2022, 20:42) | 60 | 99 % |
| Third Degree by Die Hard (on 13. February 2024, 11:52) | 60 | 95 % |
| The Unity of Opposites by ViKingPrime (on 19. May 2024, 00:45) | 30 | 91 % |
| Chaosandwich by grkles (on 11. April 2022, 19:24) | 77 | 100 % |
| Overflow by IcyFruit (on 10. November 2023, 16:27) | 81 | 96 % |
| 6556 by abed hawila (on 23. March 2021, 21:07) | 21 | 99 % |
| Wichtel 2020 (7): Ärger in der Wichtelwerkstatt by wichtel (on 15. September 2021, 20:20) | 21 | 100 % |
| Fünf aßen Neun by MavericksJD (on 30. January 2022, 19:53) | 25 | 95 % |
| The final test (Deconstruction/Killer/Anti-Knight/Connect the dots) by dumediat (on 30. December 2022, 03:17) | 21 | 100 % |
| Thinking in Circles by Mennoo_ (on 22. June 2023, 11:34) | 22 | 92 % |
