(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 | |
|---|---|---|---|
 | Mantis by Tyrgannus (on 14. September 2021, 01:08) | 33 |  93 % |
| Seven Arrow Carpet Sudoku by jackisaacbryan (on 22. March 2022, 20:34) | 15 | 90 % |
| Wings by Sabrar (on 7. June 2022, 16:17) | 13 | 90 % |
| 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 % |
| Killer RBC1-6 by RockyRoer (on 3. February 2023, 11:42) | 35 | 95 % |
| 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 % |
| Cavino Royale (Canal View Nonogram) by PrimeWeasel (on 22. April 2024, 09:23) | 41 | 99 % |
| Screwtape's Spiral by ndsurgenor (on 14. July 2024, 12:00) | 17 | 95 % |
| 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 % |
