(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 | |
|---|---|---|---|
 | Thermo Yin Yang by oklux (on 10. October 2022, 19:44) | 49 |  96 % |
| Sea Skeleton [Classic Sudoku] by wisty (on 25. October 2022, 20:28) | 64 | 94 % |
| Parity Party XXVI, "Silly String" by glum_hippo (on 7. January 2023, 15:26) | 16 | 90 % |
| Thermollominologically (Fillomino/Thermo) by dumediat (on 12. January 2023, 00:00) | 58 | 95 % |
| 23 Renban by Florian Wortmann (on 8. February 2023, 19:32) | 106 | 97 % |
| Bermuda Triangle by XeonRisq (on 3. May 2023, 04:00) | 22 | 90 % |
| Hybrid Star Battle Series (019) - Chiaroscuro by BenceJoful (on 17. May 2023, 03:02) | 25 | 95 % |
| Sextuple by Blashyrkh (on 24. July 2023, 12:36) | 50 | 94 % |
| Cross-Stitch Monster by virtual (on 27. July 2023, 03:07) | 21 | 99 % |
| I'm a Vampire (Nicolas Cage) by gdc (on 6. August 2023, 20:48) | 25 | 99 % |
| Wheels on the Bus (Wheels, Disjoint) by Crusader175 (on 21. August 2023, 17:00) | 53 | 94 % |
| Copperhead (German Whisper Snake) by Video Floral (on 22. November 2023, 15:17) | 17 | 100 % |
| Doubling Season by Syntheticc (on 10. February 2024, 07:06) | 50 | 94 % |
| If At All Possible by Big Tiger (on 11. April 2024, 21:11) | 23 | 94 % |
| Zodiac Project: Minefield Maneuvers by SamuPiano (on 30. June 2024, 15:00) | 87 | 97 % |
| Alphabet X-Sums by Scruffamudda (on 9. July 2024, 11:28) | 18 | 93 % |
| Whirlpool by vitaminz (on 13. September 2024, 03:39) | 43 | 92 % |
| Special Theory of Relativity by Tobias Brixner (on 18. October 2024, 16:00) | 29 | 94 % |
| [TSL][S1T1] Per-Pea-Tuate by SamuPiano (on 17. October 2024, 15:44) | 15 | 92 % |
| TTOL by ICHTUES (on 27. December 2024, 10:00) | 44 | 92 % |
