(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 | |
|---|---|---|---|
 | Wichtel 2020 (7): Ärger in der Wichtelwerkstatt by wichtel (on 15. September 2021, 20:20) | 24 |  100 % |
| Silvester by PulverizingPancake (on 24. January 2022, 02:00) | 41 | 98 % |
| Exploded Sum Compass Sudoku by stephane.bura (on 31. January 2022, 21:00) | 15 | 100 % |
| Los Angeles by ICHTUES (on 24. July 2022, 06:00) | 69 | 98 % |
| Sprawl by jovi_al (on 22. September 2022, 20:27) | 25 | 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) | 27 | 93 % |
| 4 in 1 monster mess by Villse (on 9. September 2025, 15:52) | 12 | 95 % |
| Cavernous Japanese Sum: Christmas Tapa ft. Ciphers (14x14) by Playmaker6174 (on 24. December 2025, 15:00) | 13 | 98 % |
| Confluence by mathpesto (on 24. April 2023, 17:00) | 65 | 98 % |
| Schrödinger Sudkuro by ICHTUES (on 30. October 2022, 06:00) | 50 | 98 % |
| Sun Chariot by Miky (on 14. April 2021, 00:17) | 46 | 94 % |
| Aqres of Shikaku Country (9x9) by mathpesto (on 29. October 2022, 22:57) | 35 | 98 % |
| Nurikabe and Chaos by wooferzfg (on 20. February 2023, 02:53) | 72 | 100 % |
| Thermo Sudoku by trivial171 (on 6. September 2020, 19:48) | 61 | 97 % |
| Zweiter Pfeilchenstrauß by glum_hippo (on 24. August 2020, 17:26) | 25 | 93 % |
| Compass Fillomino #3: Large grid by MagnusJosefsson (on 23. April 2021, 17:44) | 47 | 97 % |
