(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 | |
|---|---|---|---|
 | Border Vision by wooferzfg (on 15. April 2022, 03:53) | 43 |  97 % |
| Doubling Down by antiknight (on 5. June 2023, 17:59) | 22 | 94 % |
| Mönch (Killer sudoku) by Qodec (on 13. December 2023, 21:51) | 74 | 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 % |
| Interchangeable by palpot (on 2. April 2024, 00:16) | 26 | 96 % |
| Wichtels Rätselsommer 2024 (8): Kakuro-Messfehler by wichtel (on 17. September 2024, 20:23) | 29 | 99 % |
| 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 % |
| Dual Slitherlink by Phistomefel (on 8. May 2020, 11:09) | 62 | 97 % |
| Suguru Chaos Deconstruction: Zipper Lines by ONeill (on 24. December 2023, 04:34) | 71 | 99 % |
| Castle Wall Delta #1 (10x10) by Jesper (on 22. May 2021, 17:38) | 77 | 97 % |
| Ein JaTaHoKu by Statistica (on 27. October 2011, 15:00) | 67 | 97 % |
| The Devil's Arrows by Lisztes (on 22. February 2021, 01:00) | 24 | 96 % |
| Kropki Pairs Level III by Qodec (on 20. January 2021, 00:13) | 32 | 93 % |
