(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 | |
|---|---|---|---|
 | Colorguru Chaos Deconstruction: Renbans by crispy16 (on 23. June 2022, 05:33) | 27 |  99 % |
| Pierced by Joseph nehme (on 23. July 2022, 09:01) | 59 | 90 % |
| Whispering Worms by Lizzy01 (on 27. September 2022, 10:46) | 12 | 93 % |
| Poison Jar by JeffWajes (on 14. October 2022, 21:30) | 14 | 93 % |
| No Black Dots by mormagli (on 7. November 2022, 22:06) | 28 | 99 % |
| Modunacci by Goofy (on 16. February 2023, 00:02) | 14 | 90 % |
| Division Cell by billybobo445 (on 12. May 2023, 04:48) | 49 | 98 % |
| Duppels by ICHTUES (on 20. August 2023, 07:21) | 38 | 93 % |
| To The Nines by arbitrary (on 9. October 2023, 23:05) | 12 | 93 % |
| Doublers and Halvers by chrisjnap (on 2. August 2024, 00:05) | 15 | 93 % |
| Tirol Choco (Chocona Hybrid) by sfushidahardy (on 20. September 2024, 02:20) | 33 | 100 % |
| Dark Centers of the Universe by Groktilian (on 11. November 2024, 07:00) | 11 | 90 % |
| Set Sail, from A to Sea by Groktilian (on 25. November 2024, 07:00) | 12 | 90 % |
| Downtown Circle by Ridhwan (on 4. December 2024, 16:43) | 25 | 96 % |
| Chromatic Cages by EricRathbun (on 2. December 2025, 00:37) | 17 | 90 % |
| Position Sums Thermo Sudoku by clover (on 26. January 2025, 12:53) | 26 | 92 % |
| Convection Currents by ThePedallingPianist (on 20. May 2025, 15:16) | 27 | 90 % |
| Arrows of War by DubiousMobius (on 22. July 2025, 01:03) | 16 | 98 % |
| Shuffledoku by Kaktuslav (on 31. October 2025, 08:00) | 13 | 98 % |
| Cycles of Time and Tide by zetamath (on 6. July 2025, 00:38) | 123 | 96 % |
