(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 | |
|---|---|---|---|
 | Defiance by Maximus (on 2. August 2025, 08:44) | 18 |  94 % |
| Wichtels Rätselherbst 2025 (1): Wichtelkabbelei by wichtel (on 1. October 2025, 20:25) | 15 | 100 % |
| Säntis (collab with ICHTUES) by Florian Wortmann (on 25. October 2023, 20:05) | 127 | 96 % |
| Aim High! (YY) by SennyK (on 17. January 2026, 18:01) | 91 | 95 % |
| Crosshairs by NicoD (on 2. February 2026, 05:30) | 72 | 94 % |
| Popcorn by PulverizingPancake (on 6. February 2023, 17:16) | 57 | 92 % |
| Diamonds And Butterflies by Niverio (on 15. July 2023, 17:58) | 57 | 95 % |
| RAT RUN 8: Discontinuous by marty_sears (on 24. July 2024, 01:00) | 778 | 97 % |
| Little Killer Sudoku #2 by Phistomefel (on 25. March 2020, 15:42) | 104 | 96 % |
| Reversi by Wuschel (on 5. November 2023, 21:18) | 77 | 96 % |
| Japanische Summen gerade - ungerade by ibag (on 1. August 2012, 22:10) | 84 | 99 % |
| Imprisoned (Killer Rooms Sudoku) by Agent (on 2. July 2022, 09:00) | 90 | 99 % |
| 2many arrows spoil the box by tesseralis (on 27. August 2022, 07:31) | 101 | 96 % |
| U-Bahn unter Hochhäusern (Teil 9) by Zzzyxas (on 5. May 2012, 18:21) | 55 | 98 % |
| Cross Whispers by Fool on Hill (on 1. June 2023, 15:08) | 60 | 93 % |
| Shiny (Cave; Suguru/Fillomino) by MaizeGator (on 27. August 2024, 04:34) | 60 | 96 % |
| This or That - Killer Sudoku by Mr.Menace (on 31. August 2024, 19:22) | 66 | 92 % |
| Toroidal Snake - etwas verkürzt by lupo (on 4. February 2018, 23:53) | 21 | 94 % |
| Roller Coaster U-Bahn by Zzzyxas (on 22. August 2019, 18:25) | 58 | 99 % |
| Flower by zetamath (on 6. January 2021, 23:12) | 84 | 94 % |
