(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 | |
|---|---|---|---|
 | Gabe Ruth hits a homerun by SirWoezel (on 28. April 2021, 18:49) | 25 |  96 % |
| Nexus by udukos (on 12. June 2021, 01:00) | 43 | 98 % |
| Cycle (Between lines sudoku) by Lizzy01 (on 8. September 2021, 10:45) | 20 | 97 % |
| Leapfrog by jovi_al (on 9. April 2022, 00:30) | 65 | 96 % |
| Suguru Chaos Deconstruction: Sectioned Thermos by crispy16 (on 23. April 2022, 16:44) | 61 | 99 % |
| 10-in-9 Killer Sudoku by KNT (on 10. May 2022, 01:14) | 42 | 99 % |
| Tête-á-tête (Between Line Nabner) by tallcat (on 11. September 2023, 08:00) | 46 | 95 % |
| RedivideR by goodcity (on 17. March 2024, 16:36) | 19 | 93 % |
| Schrodinger's Split Peas by SamuPiano (on 12. July 2024, 15:44) | 40 | 97 % |
| 2 Corinthians 4:18 (Aqre Anti-X-Sum Chaos Deconstruction) by MaizeGator (on 18. September 2024, 01:43) | 21 | 94 % |
| Japanese Slitherlink by KNT (on 27. October 2024, 22:43) | 39 | 100 % |
| Lawful Wrogn by Niverio (on 20. March 2023, 16:33) | 79 | 95 % |
| Heqtare by mathpesto (on 2. September 2022, 18:31) | 55 | 99 % |
| Shadow by TotallyNormalCat (on 4. July 2022, 14:00) | 38 | 97 % |
| 6 Arrows by Jeet Sampat (on 25. September 2022, 22:46) | 38 | 97 % |
| Nurikiller 2 by mathpesto (on 4. April 2023, 13:53) | 73 | 100 % |
| Above Average On Average (Geometry Experiment 5) by Jeet Sampat (on 22. July 2023, 17:45) | 34 | 95 % |
| Some Kind of Chaos by marty_sears (on 24. May 2024, 09:25) | 106 | 98 % |
| Japanese Aquarium by Jay Dyer (on 3. January 2023, 23:06) | 59 | 99 % |
| Thermo Arrow Sudoku by clover (on 15. October 2020, 00:54) | 16 | 98 % |
