(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 | |
|---|---|---|---|
 | Remanence by Emphyrio (on 12. October 2021, 04:24) | 33 |  97 % |
| Wichtel 2020 (13 und Schluss): Bescherung in Überlappenhausen by wichtel (on 27. October 2021, 20:20) | 13 | 100 % |
| Everything Is Rihgt by DiMono (on 30. September 2022, 03:03) | 90 | 96 % |
| Chaos Construction: Numbered Regions #2 by Jesper (on 2. October 2022, 15:14) | 84 | 100 % |
| Fill-a-Renban by SSG (on 23. July 2023, 07:22) | 40 | 95 % |
| A Third Loop by mathpesto (on 24. August 2023, 02:34) | 44 | 99 % |
| Adventskalender 2023, Türchen 16 - Untergrundangeln by Zzzyxas (on 16. December 2023, 07:00) | 28 | 98 % |
| 2 Corinthians 4:18 (Aqre Anti-X-Sum Chaos Deconstruction) by MaizeGator (on 18. September 2024, 01:43) | 16 | 92 % |
| Bafflement by Xenonetix (on 3. October 2022, 01:10) | 50 | 100 % |
| Never (Yajilin/Sudoku) by Wessel Strijkstra (on 6. November 2022, 17:41) | 49 | 95 % |
| Chaos Sandwich by Bert (on 24. February 2024, 16:36) | 50 | 93 % |
| Red and Blue by zetamath (on 19. February 2021, 18:41) | 38 | 98 % |
| Purple vs Green (Entropy Sudoku) by Mad-Tyas (on 4. April 2023, 10:14) | 35 | 92 % |
| Suguru Chaos Deconstruction: Sectioned Thermos by crispy16 (on 23. April 2022, 16:44) | 60 | 99 % |
| Wichtel 2020 (3): Wichtel beim Glühwein by wichtel (on 10. April 2021, 00:22) | 20 | 99 % |
| Arrows and Palindromes - II by tenaliraman (on 18. April 2021, 21:22) | 25 | 91 % |
| Nurikiller 2 by mathpesto (on 4. April 2023, 13:53) | 71 | 100 % |
| Total Chaos by Bert (on 5. June 2024, 18:32) | 21 | 97 % |
| Cavernous Construction by GarlicBredFries (on 5. May 2022, 06:47) | 70 | 100 % |
| Heqtare by mathpesto (on 2. September 2022, 18:31) | 54 | 99 % |
