(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 | |
|---|---|---|---|
 | Top Right Boi (Psycho look-and-say/Arrow) by dumediat (on 21. June 2025, 12:00) | 31 |  93 % |
| True Equality by Manta-Ray (on 4. October 2025, 15:01) | 15 | 93 % |
| Caves can hide secrets by cornish-john (on 8. February 2026, 17:45) | 40 | 93 % |
| e m p t y = c h a o s by aqjhs (on 28. December 2024, 06:15) | 73 | 98 % |
| Gerade Ungerade Tapa-Höhle by tuace (on 7. December 2015, 12:20) | 51 | 98 % |
| Sandwiched Clues by RockyRoer (on 5. March 2021, 11:35) | 20 | 96 % |
| Regional Differences by apiyo (on 24. May 2021, 14:37) | 22 | 97 % |
| Border Vision by wooferzfg (on 15. April 2022, 03:53) | 44 | 97 % |
| Doubling Down by antiknight (on 5. June 2023, 17:59) | 22 | 94 % |
| Mönch (Killer sudoku) by Qodec (on 13. December 2023, 21:51) | 75 | 95 % |
| Destin Sunset (YIN-Yang Fillomino) by MaizeGator (on 1. August 2024, 15:39) | 49 | 98 % |
| Whispering Arrows by antiknight (on 8. April 2022, 22:57) | 27 | 98 % |
| Wasteland [Landvermessung/Chaos Deconstruction] by zzw (on 16. April 2024, 13:26) | 29 | 95 % |
| Cygnus (Kurodoko + Yajilin Amalgam) by sfushidahardy (on 29. October 2024, 04:23) | 31 | 99 % |
| Japanische ABCtje-Summen by ibag (on 22. September 2012, 00:08) | 56 | 99 % |
| Wichtel 2018 (7): Das historische Rätselhausen by wichtel (on 13. December 2019, 21:08) | 31 | 99 % |
| Roller Coaster Cipher by ONeill (on 16. June 2024, 16:26) | 34 | 99 % |
| Anti-Springer Killer, "Das Stundenglas" by glum_hippo (on 4. November 2020, 01:26) | 51 | 94 % |
| Twilight Nurikabe by KNT (on 3. January 2023, 02:12) | 43 | 99 % |
| Jumelage [RSL Renban Twin Sudokus] by Christounet (on 22. October 2024, 13:09) | 40 | 96 % |
