(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 | |
|---|---|---|---|
 | NNN by mith (on 28. March 2022, 23:09) | 42 |  96 % |
| Zig by grkles (on 29. May 2022, 20:40) | 50 | 96 % |
| (1)59.(4) by twototenth (on 31. May 2022, 08:00) | 35 | 96 % |
| Companions by Joseph nehme (on 3. November 2022, 09:46) | 20 | 92 % |
| A-Sums X Sandwich by ICHTUES (on 29. January 2023, 06:00) | 58 | 96 % |
| Whispers of Entropy 2: Balance by Mad-Tyas (on 6. March 2023, 09:01) | 36 | 97 % |
| Zoom by matt383 (on 22. March 2023, 13:49) | 79 | 95 % |
| Escape the Programmer's Vortex by Oddlyeven (on 31. March 2023, 02:45) | 18 | 93 % |
| U-Bahn with Cages by wooferzfg (on 26. April 2023, 23:39) | 36 | 95 % |
| Vlad the Impaler - Parity mirror, killer sudoku by Mr.Menace (on 19. August 2023, 08:14) | 41 | 94 % |
| N-lines by Lizzy01 (on 19. February 2024, 11:19) | 19 | 95 % |
| Big ol' arrow (deconstruction) by graggle (on 13. September 2025, 11:00) | 19 | 93 % |
| X-in V-ang by NurglesGift (on 9. November 2025, 15:25) | 43 | 91 % |
| Lion (Non-touching killer sudoku) by Qodec (on 18. May 2022, 11:58) | 114 | 94 % |
| War with Pythagoras by JeffWajes (on 20. July 2025, 11:39) | 87 | 96 % |
| Smus-X by Qodec (on 25. September 2022, 14:44) | 64 | 96 % |
| Guillotine by Qodec (on 4. September 2022, 12:20) | 53 | 95 % |
| This + This = That by EricRathbun (on 1. November 2023, 15:55) | 49 | 97 % |
| Edelweiß by loerting (on 27. December 2023, 23:20) | 55 | 95 % |
| 4th of July Encrypted Thermo-Sandwich by Alexander Rappa (on 3. July 2020, 16:15) | 31 | 92 % |
