(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 | |
|---|---|---|---|
 | Pandemonium by Andrewsarchus (on 23. July 2025, 13:45) | 22 |  97 % |
| Try-ominos Cave by damasosos92 (on 23. July 2025, 17:54) | 28 | 98 % |
| Liar Japanese Sums (Knapp Daneben) by Piatato (on 22. August 2025, 21:14) | 16 | 98 % |
| FullY in Yank by MathGuy_12 (on 25. September 2025, 01:03) | 20 | 96 % |
| Chaos Construction: Lighthouse by Phistomefel (on 15. November 2021, 22:52) | 70 | 97 % |
| Ne Plus Ultra by Andrewsarchus (on 3. February 2022, 08:55) | 63 | 100 % |
| Derezzed by heliopolix (on 23. April 2024, 22:00) | 53 | 97 % |
| Japanese Crossroads by Phistomefel (on 30. June 2024, 19:49) | 55 | 98 % |
| Blackreach (U-Bahn Roller Coaster Cipher) by Agent (on 19. May 2023, 09:00) | 43 | 100 % |
| Theseus (Chaos Construction Sudoku) by Mr.Menace (on 17. March 2023, 10:27) | 50 | 94 % |
| Chaos Construction: Regional Skyscrapers by MagnusJosefsson (on 14. April 2022, 11:51) | 44 | 99 % |
| Region Geometry by kolot (on 13. May 2022, 18:29) | 84 | 100 % |
| Entropia: Heat Up by Mad-Tyas (on 27. November 2023, 10:55) | 51 | 94 % |
| Skyscraper Sums Deconstruction by Tacosian (on 24. January 2024, 04:07) | 41 | 100 % |
| Kitchen Nightmare (Sandwich Chaos Construction) by Tacosian (on 14. November 2023, 05:01) | 38 | 98 % |
| Chaos Pentominoes by Tacosian (on 9. March 2024, 23:14) | 43 | 94 % |
| Fractured by Andrewsarchus (on 13. June 2022, 09:15) | 36 | 98 % |
| Hungarian Tapa / Roller Coaster (2) by KNT (on 28. September 2022, 16:37) | 37 | 98 % |
| Shade Your Own Puzzle: Fillomino vs Cave ft. Parity #2 (15x15) by Playmaker6174 (on 25. October 2024, 19:00) | 39 | 99 % |
| Crossbeams (Little Killer) by Gliperal (on 7. October 2020, 02:25) | 34 | 98 % |
