(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 | |
|---|---|---|---|
 | Schlangen im Fillomino-Nest II by tuace (on 3. March 2017, 11:24) | 36 |  99 % |
| As My Guitar Gently Sweeps by Andrewsarchus (on 22. December 2021, 08:42) | 38 | 95 % |
| Renmometers by Jeet Sampat (on 1. June 2022, 21:50) | 44 | 92 % |
| Levity by Emphyrio (on 29. October 2022, 09:51) | 47 | 94 % |
| Vibrations (Killer, Thermo) by Niverio (on 30. September 2023, 17:01) | 132 | 95 % |
| The Knight's Battle Axe by masetab (on 15. November 2025, 04:52) | 46 | 93 % |
| Cave / Nurikabe by Jesper (on 1. November 2020, 16:50) | 89 | 99 % |
| Knight Fever by apiyo (on 31. January 2021, 03:19) | 60 | 96 % |
| Even X-Sums by Realshaggy (on 24. December 2021, 05:00) | 50 | 97 % |
| Where No Snake Has Gone Before by Nordy (on 13. July 2022, 20:43) | 49 | 99 % |
| XV*4.0 by NurglesGift (on 20. November 2024, 18:13) | 140 | 97 % |
| Empire State of Mind (Numbered Rooms Skyscraper) by tallcat (on 12. May 2023, 09:00) | 75 | 94 % |
| Waben Summenhochhauskropki Triple Invers und knapp daneben by Luigi (on 15. February 2010, 12:31) | 32 | 93 % |
| Loses Kalenderblatt April 2015 by April (on 1. April 2015, 00:00) | 29 | 97 % |
| Boundless (Many Variants!) by Aaronomys (on 31. May 2021, 11:28) | 16 | 96 % |
| Minesweeper Sudoku by Niverio (on 24. November 2021, 23:53) | 43 | 98 % |
| Crossroad by Testarossa (on 18. January 2022, 20:44) | 33 | 94 % |
| Linked Lists by Innocuous (on 22. September 2022, 19:42) | 18 | 90 % |
| Jigsaw-doku by jwsinclair (on 3. October 2022, 20:31) | 28 | 98 % |
| Disoriented (Chaos Construction) by Agent (on 3. January 2023, 09:00) | 58 | 99 % |
