(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 | |
|---|---|---|---|
 | The Red and the Black (Anti-King Arrow) by tallcat (on 18. October 2021, 15:41) | 54 |  92 % |
| Fog of Chaos by lepton (on 26. February 2023, 18:09) | 194 | 92 % |
| Min-Max-Sichtblöcke (3) by BFaw (on 14. December 2016, 10:00) | 18 | 95 % |
| 159 Sandwiches by RockyRoer (on 19. February 2021, 21:33) | 35 | 99 % |
| Alley of Arrows by MavericksJD (on 19. April 2021, 13:36) | 39 | 98 % |
| Arrow Logic by PotatoHead21 (on 17. May 2021, 21:03) | 20 | 95 % |
| Vacancy (Chaos Construction) by thoughtbyte (on 28. August 2023, 06:30) | 75 | 96 % |
| The Deck of Many Things by ViKingPrime (on 7. September 2023, 20:30) | 18 | 98 % |
| Sky-Skyscraper by Phistomefel (on 22. March 2024, 15:29) | 90 | 99 % |
| The Buddy System by Allagem (on 20. June 2024, 07:55) | 82 | 98 % |
| Knight of Chaos by Andrewsarchus (on 4. December 2024, 18:44) | 42 | 98 % |
| Short Arrows by Las4one (on 17. December 2024, 11:16) | 43 | 95 % |
| I Like Fun (With sujoyku) by Gene The Supreme (on 16. March 2025, 17:37) | 40 | 97 % |
| Foggy “Pair”-rows by Visumation (on 8. January 2025, 14:09) | 62 | 91 % |
| Intersections Sudoku by RockyRoer (on 16. July 2021, 14:00) | 21 | 93 % |
| [159] The Sum of All Indexing by W1DEMAN (on 9. November 2022, 09:59) | 22 | 97 % |
| Fujiyama by Myxo (on 14. December 2022, 14:24) | 37 | 99 % |
| Concurrence by Oddlyeven (on 31. May 2025, 01:34) | 19 | 94 % |
| Read Peatween The Lines by .proxz14 (on 17. January 2026, 10:53) | 20 | 91 % |
| Whisper Whisper by Jay Dyer (on 20. August 2022, 13:08) | 45 | 97 % |
