(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 | |
|---|---|---|---|
 | double negative by arctan (on 24. September 2024, 22:02) | 28 |  95 % |
| Absolute Chaos by Fenners (on 8. April 2025, 12:47) | 108 | 96 % |
| Ren-Bahn #2 [Renban U-Bahn] by Christounet (on 6. September 2025, 16:46) | 25 | 99 % |
| In The Zone by EdTheAlchemist (on 4. November 2025, 13:54) | 64 | 94 % |
| Snowtropics 3 by SecondBlue (on 17. December 2025, 06:00) | 17 | 93 % |
| Five Fish by SXH (on 28. November 2024, 02:57) | 134 | 95 % |
| Daybreak (Antiknight Thermo Sudoku) by Playmaker6174 (on 11. October 2022, 04:47) | 97 | 98 % |
| Bob the Killer by mellowrobinson (on 14. June 2025, 04:33) | 95 | 96 % |
| Yin Yang Multi-thermos by yttrio (on 8. March 2024, 20:20) | 77 | 98 % |
| Brooklands (Doubler/Region Sum Line) by damo_89 (on 22. April 2025, 00:08) | 63 | 96 % |
| Bagels & Deli by ICHTUES (on 3. September 2023, 06:00) | 45 | 97 % |
| Giraffe Hunt 2 by ralphwaldo1 (on 24. October 2024, 22:08) | 58 | 90 % |
| Ten-ish by ChinStrap (on 29. December 2025, 14:10) | 47 | 97 % |
| Pierced Cages by Mark Sweep (on 29. January 2021, 10:00) | 36 | 94 % |
| Throwing Shade by tesseralis (on 19. June 2022, 01:25) | 28 | 98 % |
| Breach by vitaminz (on 16. May 2024, 00:15) | 33 | 98 % |
| Befuddlement by Oddlyeven (on 8. July 2025, 03:01) | 145 | 98 % |
| Hide and Seek by Jooshy (on 2. December 2025, 18:55) | 44 | 94 % |
| X---V*3 by NurglesGift (on 28. March 2025, 06:00) | 90 | 96 % |
| 5K 5T by Joseph nehme (on 24. April 2021, 06:31) | 54 | 97 % |
