(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 | |
|---|---|---|---|
 | Equilibrium by Mad-Tyas (on 1. November 2022, 09:41) | 59 |  98 % |
| Liar Japanese Sums #3: Renban Square by Niverio (on 8. January 2023, 21:45) | 60 | 98 % |
| Sum Compass Sudoku by stephane.bura (on 31. December 2020, 20:00) | 24 | 100 % |
| Adventskalender 2023, Türchen 21 - Lügende Passierscheine by Zzzyxas (on 21. December 2023, 07:00) | 25 | 98 % |
| Chequered Arromino #2 by Phistomefel (on 25. May 2023, 20:32) | 96 | 98 % |
| Matty Didn't Call You Back Because He Had The Wrogn Number by Laake (on 26. September 2024, 22:11) | 43 | 95 % |
| Gabe Ruth hits a homerun by SirWoezel (on 28. April 2021, 18:49) | 24 | 96 % |
| Cycle (Between lines sudoku) by Lizzy01 (on 8. September 2021, 10:45) | 19 | 97 % |
| The Final Fourteen by FryTheGuy (on 20. October 2021, 05:38) | 24 | 96 % |
| Wordless Kakuro by qiuyanzhe (on 26. November 2021, 08:34) | 19 | 92 % |
| Imbalanced Flower by MavericksJD (on 19. June 2022, 21:33) | 28 | 91 % |
| The Postman Problem by ThePedallingPianist (on 6. July 2023, 13:16) | 19 | 100 % |
| Vampires Magnet Butterfly by damasosos92 (on 15. April 2024, 16:40) | 23 | 91 % |
| Thermo + Killer + Anti-Knight by stimim (on 30. July 2020, 17:38) | 85 | 99 % |
| Whisper Cave Sudoku by KNT (on 19. May 2022, 08:53) | 69 | 99 % |
| Nothing to see here by fritzdis (on 31. August 2023, 09:36) | 31 | 97 % |
| Wichtelkalender 2013 - Oktober by pin7guin (on 1. October 2013, 00:00) | 25 | 91 % |
| Parity Party VII — "Party Sandwiches" by glum_hippo (on 25. April 2020, 23:24) | 16 | 93 % |
| Killer Sudoku 809 by Quarterthru (on 24. August 2020, 12:00) | 49 | 91 % |
| Poison Arrow 2 by FryTheGuy (on 13. May 2021, 04:04) | 15 | 92 % |
