(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 | |
|---|---|---|---|
 | Challah by pieguy (on 10. November 2023, 03:30) | 47 |  92 % |
| Indirect Communication by blackjackfitz (on 19. February 2024, 15:08) | 26 | 97 % |
| A Zip of Blood (Vampires, Zippers) by gdc (on 13. March 2024, 17:46) | 46 | 94 % |
| Domino Effect by vitaminz (on 12. April 2024, 15:49) | 70 | 96 % |
| Arrow 100 by Mad-Tyas (on 2. September 2024, 13:30) | 26 | 90 % |
| Tirol Choco (Chocona Hybrid) by sfushidahardy (on 20. September 2024, 02:20) | 35 | 100 % |
| Walkie Talkie (choco banana-ten lines sudoku) by Ambrose (on 26. January 2025, 00:00) | 22 | 95 % |
| Position Sums Thermo Sudoku by clover (on 26. January 2025, 12:53) | 28 | 93 % |
| Racetrack by phil_the (on 22. May 2025, 11:15) | 12 | 91 % |
| Union Intersection by morrisjb (on 11. June 2025, 02:46) | 12 | 98 % |
| There's a 1 at 3:00 by Md88keys (on 30. August 2025, 20:52) | 25 | 94 % |
| Focal Points by TrivialHomology (on 26. November 2025, 16:00) | 33 | 91 % |
| Sigil of Intervals by masetab (on 4. February 2026, 15:23) | 30 | 92 % |
| Fog and Phantoms: High Seas, Low Spirits by DubiousMobius (on 26. February 2026, 21:53) | 56 | 96 % |
| funky parmesan curls by aqjhs (on 7. March 2026, 21:32) | 41 | 95 % |
| XY-Cages by glum_hippo (on 1. May 2022, 06:05) | 63 | 93 % |
| Sacred Crypt by Allagem (on 6. May 2023, 08:15) | 67 | 95 % |
| ABENNR by FullDeck-Missing (on 14. November 2024, 06:20) | 74 | 96 % |
| Loop With A Difference by Scruffamudda (on 5. May 2023, 00:09) | 51 | 96 % |
| Quantum Chaos (CC, S-Cells) by gdc (on 31. August 2024, 00:26) | 60 | 95 % |
