(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 | |
|---|---|---|---|
 | Juosan Division by Jay Dyer (on 16. December 2021, 23:30) | 19 |  97 % |
| Twenty-four and what? by andreasv (on 8. March 2022, 07:37) | 24 | 92 % |
| L.O.V.E. to S.O.L.V.E. by mathpesto (on 2. May 2022, 10:22) | 45 | 94 % |
| Skyline by FinnishGuy (on 6. May 2022, 22:24) | 19 | 92 % |
| Was it a car or a cat I saw? by Angelo (on 20. July 2022, 21:23) | 19 | 98 % |
| Canvas by Crusader175 (on 18. September 2022, 16:00) | 19 | 97 % |
| Campsite #3 by PrimeWeasel (on 24. January 2023, 20:40) | 17 | 97 % |
| Anti-Z by Christounet (on 19. April 2023, 00:18) | 38 | 97 % |
| Pac-Man Sudoku by mathpesto (on 10. June 2023, 04:50) | 129 | 94 % |
| The Knights Who Say "Negator" by Scojo (on 17. September 2023, 06:41) | 22 | 98 % |
| Double Squished by Prof.Dori (on 14. December 2023, 01:57) | 19 | 94 % |
| J.O.E. by JayForty (on 7. February 2024, 14:42) | 84 | 97 % |
| Hallways & Corridors (Between Numbered Rooms) by tallcat (on 16. September 2024, 21:27) | 86 | 92 % |
| Bicycle by oskode (on 16. September 2025, 05:57) | 47 | 93 % |
| Samurai Sandwiches by mathpesto (on 28. December 2022, 17:34) | 67 | 94 % |
| Wichtel 2017 (5): Japanische Weihnachtskoralle 2358 by wichtel (on 31. May 2018, 09:05) | 48 | 96 % |
| Four Leaf... by Bremster (on 3. January 2022, 23:13) | 53 | 94 % |
| Quintessence [Pentominous Fillomino] by MicroStudy (on 29. June 2023, 21:28) | 79 | 95 % |
| Multi-sudoku: Orb 3 - Christmas snORBall by DiMono (on 20. December 2021, 18:14) | 30 | 98 % |
| Galactic Skirmish (Spiral Galaxy, Star Battle, Killer Sudoku) by AnalyticalNinja (on 1. February 2023, 02:21) | 97 | 95 % |
