(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 | |
|---|---|---|---|
 | Meidjuluk II (N=25) by glum_hippo (on 1. June 2023, 00:00) | 56 |  100 % |
| Building between by Paletron (on 10. August 2023, 20:20) | 59 | 96 % |
| Broken Gift (Partial Irregular Killer Sudoku) by peterchayward (on 16. May 2021, 11:42) | 42 | 92 % |
| Powercut [S-cell, Renban, RSL] by Christounet (on 30. June 2023, 23:48) | 41 | 100 % |
| Araf Killer Sudoku by Phistomefel (on 28. July 2020, 09:00) | 103 | 98 % |
| Loses Kalenderblatt April 2019 (2/2) by April (on 1. April 2019, 12:00) | 24 | 99 % |
| Roller Coaster mit Extras 17 by Uhu (on 9. April 2020, 20:36) | 38 | 98 % |
| Sandwich Fillomino #1 - Vicious Circle by Mark Sweep (on 19. March 2021, 10:00) | 14 | 98 % |
| 6556 by abed hawila (on 23. March 2021, 21:07) | 23 | 99 % |
| Silvester by PulverizingPancake (on 24. January 2022, 02:00) | 41 | 98 % |
| Exploded Sum Compass Sudoku by stephane.bura (on 31. January 2022, 21:00) | 13 | 100 % |
| Chaos Construction: Color Mixing by KNT (on 15. May 2022, 17:41) | 41 | 97 % |
| Los Angeles by ICHTUES (on 24. July 2022, 06:00) | 69 | 98 % |
| Sprawl by jovi_al (on 22. September 2022, 20:27) | 24 | 95 % |
| Manhattan by starwarigami (on 10. October 2023, 10:59) | 16 | 95 % |
| Wichtel 2022 (9 und vorläufig Schluss): Die Wichtel in Pental by wichtel (on 1. December 2023, 23:23) | 13 | 98 % |
| Repeat Prescription by Jay Dyer (on 21. July 2024, 00:11) | 55 | 97 % |
| Wichtels Rätselsommer 2024 (4): Wirrwarr im Garten by wichtel (on 22. August 2024, 20:23) | 12 | 100 % |
| Rowena and Colin by Mad-Tyas (on 29. August 2025, 16:38) | 25 | 93 % |
| Jörmungandr by Jay Dyer (on 2. June 2022, 13:46) | 179 | 99 % |
