(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 | |
|---|---|---|---|
 | Mind the Gap (Arrow X Sudoku) by tallcat (on 28. April 2021, 02:08) | 37 |  94 % |
| Parity Arrows by Jay Dyer (on 22. January 2022, 11:54) | 16 | 95 % |
| Aad-van-ced Irregularity by crispy16 (on 14. May 2022, 05:49) | 18 | 90 % |
| Whispering Rain by JeremyDover (on 14. August 2022, 23:59) | 26 | 94 % |
| Ring Of Entropy by crispy16 (on 7. September 2022, 15:56) | 21 | 98 % |
| All 14 by Mad-Tyas (on 19. October 2022, 11:39) | 50 | 95 % |
| 23 Killer by Florian Wortmann (on 18. January 2023, 18:50) | 75 | 94 % |
| Dragon Ball Soup by meggen033 (on 18. May 2023, 08:10) | 18 | 91 % |
| Order Crossing (ft. Nordy) by damasosos92 (on 22. August 2023, 17:39) | 20 | 96 % |
| Anomaly by Migu (on 12. April 2024, 22:47) | 19 | 93 % |
| RV 315 by BaumJames (on 6. April 2024, 04:54) | 17 | 93 % |
| Yin-Yang Whisperominos by Die Hard (on 4. August 2024, 11:15) | 30 | 94 % |
| All the Arrows, Big and Small by bboom (on 24. October 2024, 10:06) | 35 | 95 % |
| Japanische Summen auf Antimagneten(2) by r45 (on 9. July 2013, 09:07) | 63 | 99 % |
| Seventh Night by SSG (on 1. December 2021, 07:07) | 64 | 94 % |
| Cube by DVFrank (on 23. June 2021, 18:34) | 41 | 97 % |
| Irradiated (Thermo, Renban) by Chefofdeath (on 14. May 2023, 20:05) | 49 | 95 % |
| KICK 4 by timyoth (on 8. April 2024, 11:05) | 91 | 93 % |
| Heatmap Sudoku by Jesper (on 13. June 2020, 16:19) | 36 | 97 % |
| Wichtel 2020 (8): Das exotische Spätabendland by wichtel (on 23. September 2021, 22:00) | 32 | 99 % |
