(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 | |
|---|---|---|---|
 | Chocona Road by mathpesto (on 15. May 2024, 04:57) | 28 |  94 % |
| Unresolved Differences by Scruffamudda (on 29. March 2023, 05:47) | 30 | 94 % |
| Between Knights and Arrows by Phistomefel (on 21. February 2021, 12:22) | 110 | 95 % |
| Your ways are numbered (broken 159, killer, disjoint) by Chilly (on 24. January 2022, 00:29) | 24 | 93 % |
| Taurus (Arrow Killer) by tallcat (on 4. May 2021, 13:32) | 46 | 97 % |
| Zeeta-Moth by 99%Sneaky (on 5. June 2024, 18:25) | 67 | 94 % |
| Pentominous Killer Kakuro by Agent (on 10. February 2024, 09:00) | 89 | 99 % |
| Kropki squared sudoku #1 by Nylimb (on 20. September 2020, 07:45) | 12 | 93 % |
| King by ICHTUES (on 22. August 2021, 06:00) | 54 | 95 % |
| Arrow Spine Indexing by Die Hard (on 20. March 2023, 11:58) | 15 | 95 % |
| Schrödinger's Knights by lepton (on 9. March 2024, 11:50) | 13 | 91 % |
| Something something lines by filuta (on 7. September 2024, 08:56) | 12 | 91 % |
| 24 Rätsel in 24 Stunden (Teil 18) - Yajilin by Zzzyxas (on 24. June 2017, 17:24) | 68 | 92 % |
| Tumbleweeds by djorr (on 6. September 2021, 14:00) | 17 | 97 % |
| Hyperloop (Double Trouble) by Mad-Tyas (on 10. November 2021, 13:53) | 18 | 97 % |
| Pentomino Sandwich by RockyRoer (on 9. January 2023, 23:42) | 16 | 97 % |
| Small Phistomefel by Stoer (on 23. April 2023, 13:19) | 21 | 91 % |
| Amicus by Andrewsarchus (on 21. August 2023, 08:43) | 39 | 94 % |
| Opposition (Black holes/Killer/Teleporting little killer) by dumediat (on 9. February 2024, 12:00) | 17 | 98 % |
| Cryptic Lunchboxes by Undar_Beyond (on 20. June 2020, 17:58) | 48 | 99 % |
