(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 | |
|---|---|---|---|
 | All Whispers Are Set (German Whispers Sudoku) by Cane_Puzzles (on 16. July 2021, 19:30) | 16 |  93 % |
| Angler by Dandelo (on 27. July 2021, 22:20) | 12 | 95 % |
| Bose-Einstein Condensate (S-cells) by purpl (on 18. January 2022, 17:34) | 24 | 99 % |
| Battle With The Archers 27: Between Friends and Enemies (part 1) by Playmaker6174 (on 5. February 2022, 11:49) | 44 | 98 % |
| First Burn by dennischen (on 4. May 2023, 08:22) | 30 | 95 % |
| Going in Blind by antiknight (on 8. June 2023, 19:10) | 32 | 98 % |
| Arrival by Kafkapharnaum (on 13. October 2023, 02:02) | 15 | 100 % |
| Parity Repellant by XeonRisq (on 24. January 2024, 17:00) | 12 | 95 % |
| The King's Archers by Lizzy01 (on 16. May 2024, 16:00) | 66 | 93 % |
| Separated Pairs by arbitrary (on 13. July 2024, 23:37) | 15 | 98 % |
| Call of Cthudoku by juggler (on 17. July 2024, 16:58) | 40 | 98 % |
| Yin Yang U-Bahn [Secret Satan #1] by Christounet (on 3. January 2025, 13:50) | 25 | 100 % |
| Golden Madness by Sfayne (on 4. February 2025, 15:31) | 12 | 91 % |
| Cassiopeia (Pentominous/Star Battle) by goodcity (on 21. February 2025, 12:12) | 27 | 97 % |
| This is how you live the Time War by pdyxs (on 27. February 2025, 05:55) | 12 | 100 % |
| Four-Color Yajilominous by Nell Gwyn (on 19. July 2025, 04:13) | 30 | 98 % |
| Cross Purposes (Quad Sums Killer Anti-King) by tallcat (on 6. June 2022, 02:42) | 67 | 99 % |
| Ambiguous Arrows Sudoku by Jay Dyer (on 25. May 2022, 21:26) | 54 | 97 % |
| XV*Roundabout by NurglesGift (on 14. March 2025, 08:00) | 116 | 96 % |
| Wichtelkalender 2013 – September by Susie (on 1. September 2013, 00:00) | 41 | 91 % |
