(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 | |
|---|---|---|---|
 | Peactograph by NicoD (on 18. September 2025, 05:30) | 39 |  98 % |
| Modular Harmony by Rab3aron (on 2. April 2026, 12:01) | 41 | 94 % |
| Sashigane Whispers by yttrio (on 15. March 2024, 19:40) | 121 | 98 % |
| 159 German Whispers Sudoku by Qodec (on 19. November 2021, 18:19) | 104 | 97 % |
| Skyscrapers Sum by abed hawila (on 25. January 2022, 13:00) | 52 | 95 % |
| Kings and/or Knights by Scruffamudda (on 5. August 2022, 03:08) | 50 | 93 % |
| Quint Quads by Ned Howarth (on 29. June 2022, 09:55) | 45 | 94 % |
| Deflation by jwsinclair (on 13. December 2022, 20:42) | 53 | 95 % |
| Intergrowth (Psycho Look-and-Say/Entropic lines/Modular lines) collab with bellsita by dumediat (on 25. February 2023, 12:51) | 44 | 99 % |
| Stepping Stone Sandwiches by RockyRoer (on 1. April 2024, 18:36) | 40 | 95 % |
| Skate by dead_homer (on 19. May 2024, 00:25) | 43 | 93 % |
| Château Laurier by Oddlyeven (on 6. March 2026, 02:42) | 43 | 93 % |
| Kin by DarthSillious72 (on 25. March 2026, 07:10) | 44 | 94 % |
| Brink by 99%Sneaky (on 22. May 2025, 20:56) | 118 | 95 % |
| Cave / Nurikabe by Jesper (on 1. November 2020, 16:50) | 92 | 99 % |
| Four Corners (Arrow Killer X) by tallcat (on 13. May 2021, 15:02) | 101 | 98 % |
| Pairs Party by Qodec (on 28. August 2021, 11:31) | 66 | 92 % |
| Renban Plasters by antiknight (on 4. April 2024, 18:32) | 39 | 94 % |
| XV*4.0 by NurglesGift (on 20. November 2024, 18:13) | 146 | 97 % |
| Kuromasudoku by Phistomefel (on 26. November 2020, 20:18) | 81 | 99 % |
