(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 | |
|---|---|---|---|
 | Killer Inception by mnasti2 (on 27. October 2022, 23:00) | 29 |  94 % |
| Tuning Forks #3 by Blashyrkh (on 28. March 2023, 12:09) | 30 | 95 % |
| Shuriken by XeonRisq (on 4. June 2023, 22:00) | 64 | 94 % |
| Eindeutig Zweideutig by Wuschel (on 26. May 2025, 14:20) | 33 | 90 % |
| Yajilin / Knapp Daneben Yajilin Permaculture by SamuPiano (on 28. August 2025, 15:44) | 29 | 98 % |
| Renban or Ren_an (Ambiguity Puzzle) by tallcat (on 11. December 2025, 03:41) | 24 | 92 % |
| Jubiläumsrätsel - 4 Jahre Rätselportal by Richard (on 1. November 2012, 00:00) | 87 | 98 % |
| X Marks The Spot by Djmelee3000 (on 11. September 2020, 08:51) | 48 | 97 % |
| Circuit Board [Standard U-Bahn] by wisty (on 14. November 2023, 17:10) | 42 | 99 % |
| Supermoon by ViKingPrime (on 19. October 2024, 21:45) | 47 | 96 % |
| ¡Dame Quince! (Killer Sudoku) by sujoyku (on 30. March 2025, 15:40) | 157 | 96 % |
| Imperfect Miracle by Las4one (on 2. August 2025, 02:00) | 73 | 95 % |
| Wichtelkalender 2014 - Dezember: Der Weg des Weihnachtsmannes by Statistica (on 1. December 2014, 00:12) | 75 | 99 % |
| Chiaroscuro-doku by yttrio (on 8. March 2025, 02:03) | 119 | 98 % |
| Steckkisten (3) by BFaw (on 25. August 2013, 14:00) | 19 | 90 % |
| Six Pathway-Linked Puzzles by Genomico (on 22. September 2020, 15:36) | 36 | 97 % |
| Carpet Sudoku III: Cleopatra's Tryst by jackisaacbryan (on 26. September 2020, 22:49) | 23 | 98 % |
| V's by ICHTUES (on 23. May 2021, 06:00) | 21 | 93 % |
| Amnesia by Dave252 (on 3. August 2021, 16:37) | 19 | 98 % |
| You've Got Mail! by starwarigami (on 29. September 2021, 00:40) | 21 | 90 % |
