(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 | |
|---|---|---|---|
 | Abstruse by Andrewsarchus (on 28. September 2024, 23:11) | 12 |  93 % |
| Dorlightfully Devilish by ThePedallingPianist (on 2. November 2024, 20:11) | 15 | 95 % |
| Blade Runner by Kafkapharnaum (on 14. March 2025, 23:39) | 16 | 98 % |
| Melancholia (Build your own arrow) by Sartor (on 15. June 2024, 23:05) | 49 | 99 % |
| Japanische Inseln, Krypto by pirx (on 28. February 2015, 17:00) | 28 | 99 % |
| Junction by grkles (on 22. May 2021, 03:53) | 28 | 99 % |
| Killer Sudoku by ahaupt (on 30. June 2020, 12:15) | 59 | 96 % |
| Disjoint Little Killer Sudoku - 89 Spinning Tops by DiMono (on 6. December 2020, 18:50) | 21 | 95 % |
| Krop Kages by Philipp Huber (on 13. February 2021, 22:44) | 18 | 98 % |
| Magic Arrows by PotatoHead21 (on 3. September 2021, 04:34) | 21 | 97 % |
| El Psy Kongroo by lerroyy (on 21. July 2022, 04:00) | 41 | 97 % |
| Watchtower sudoku by Lizzy01 (on 1. August 2022, 10:24) | 20 | 95 % |
| Double Negative by DadJokes (on 4. October 2022, 13:35) | 18 | 91 % |
| Modern Wall by XeonRisq (on 29. March 2023, 19:00) | 17 | 98 % |
| Wichtel 2022 (6): Das Kleckskakuro by wichtel (on 4. October 2023, 13:13) | 20 | 98 % |
| Doubler Trickery by Mad-Tyas (on 12. October 2024, 12:33) | 20 | 92 % |
| The Ballad of Buster Scruggs by SamuPiano (on 4. February 2025, 15:44) | 37 | 95 % |
| These Go to Fifteen by ViKingPrime (on 24. January 2026, 05:00) | 23 | 95 % |
| Castle Wall Delta #2 (15x15) by Jesper (on 1. June 2021, 08:38) | 58 | 98 % |
| Chaotically Coordinated Arrows by Piatato (on 3. March 2022, 19:58) | 64 | 98 % |
