(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 | |
|---|---|---|---|
 | Build Your Own Anti-Knight Sudoku by DiMono (on 24. October 2020, 17:41) | 19 |  94 % |
| Knightsjump Sudoku by Prutsbeest (on 21. November 2020, 21:29) | 13 | 90 % |
| Sandwich Pseudoku - 10 Donuts by DiMono (on 19. January 2021, 16:47) | 15 | 92 % |
| Poison Darts by LKegel (on 31. January 2021, 10:57) | 19 | 97 % |
| Only Little Killer Sudoku by ICHTUES (on 7. March 2021, 06:00) | 22 | 96 % |
| Fillomino-Yajilin-Tapa by CJK (on 4. April 2021, 21:15) | 97 | 100 % |
| Totem Art by tenaliraman (on 14. April 2021, 15:32) | 18 | 95 % |
| Araf's Lunchbox (6x6) by udukos (on 17. June 2021, 21:54) | 11 | 98 % |
| 真笑Puzzles040--Chaos Construction-- “孙子” 002 by cdwg2000 (on 19. May 2021, 14:59) | 26 | 99 % |
| Jeepers Creepers by panthchesh (on 21. May 2021, 05:00) | 22 | 91 % |
| The Horse Whisperer / der Pferdeflüsterer by Zombie Hunter (on 12. July 2021, 05:18) | 25 | 90 % |
| Space Battle by Jeet Sampat (on 14. September 2021, 04:38) | 16 | 93 % |
| Boxed In 2: Bigger Box by Cane_Puzzles (on 16. September 2021, 15:20) | 24 | 92 % |
| BL Sandwich by purpl (on 30. September 2021, 06:48) | 17 | 91 % |
| +1 by ICHTUES (on 21. November 2021, 06:00) | 19 | 94 % |
| X-Medians by RockyRoer (on 24. November 2021, 12:50) | 17 | 95 % |
| All My 5s Gone by wooferzfg (on 25. February 2022, 16:00) | 15 | 90 % |
| German Sandwiches by Scruffamudda (on 16. March 2022, 07:34) | 37 | 97 % |
| VIKNA (Windows) by ypkoval (on 27. April 2022, 21:23) | 27 | 94 % |
| Unicycles by starwarigami (on 3. May 2022, 11:04) | 11 | 98 % |
