(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 | |
|---|---|---|---|
 | Ringworms by XeonRisq (on 8. September 2022, 05:00) | 34 |  92 % |
| Yin Yang Arrows by Schwupel (on 23. September 2022, 19:36) | 127 | 99 % |
| The Thing by mathpesto (on 16. October 2022, 04:48) | 51 | 90 % |
| Pitter Patter by meggen033 (on 8. February 2023, 08:15) | 44 | 95 % |
| Tree Of Dominos by Jobo (on 11. March 2023, 11:13) | 14 | 92 % |
| I Want More Clues by EricRathbun (on 8. April 2023, 23:12) | 18 | 96 % |
| Japanese Sums #1: Vanilla by Myxo (on 19. April 2023, 16:00) | 90 | 98 % |
| X-Secret by Prof.Dori (on 20. June 2023, 23:50) | 24 | 92 % |
| Sudo-cuboid by ThePedallingPianist (on 28. July 2023, 16:38) | 20 | 92 % |
| Appaloosa by Die Hard (on 14. August 2023, 08:43) | 38 | 94 % |
| Tetris Ain't In My Genes by Groktilian (on 3. October 2023, 16:00) | 26 | 96 % |
| Pentominophibian (Pentomino snake puzzle) by LilGungaJr (on 30. December 2023, 00:06) | 29 | 97 % |
| Clockwork Yajilin: Parity Point by wisty (on 28. February 2024, 01:00) | 25 | 97 % |
| Propeller by Scojo (on 30. April 2024, 10:53) | 14 | 94 % |
| Suguru Sandwiches by AnalyticalNinja (on 25. June 2024, 21:25) | 14 | 90 % |
| Wichtels Rätselsommer 2024 (1): Bahnlinienplanung im Wunderwald by wichtel (on 11. August 2024, 20:23) | 28 | 100 % |
| Copycat Confusion by Phistomefel (on 19. August 2024, 18:03) | 94 | 94 % |
| X is the Key by Visumation (on 10. September 2024, 08:10) | 34 | 92 % |
| Hunting High and Low (Arrow) by Blashyrkh (on 7. November 2024, 12:15) | 38 | 92 % |
| Kyushu by AFrayedKnot (on 9. November 2024, 07:52) | 57 | 99 % |
