(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 | |
|---|---|---|---|
 | Cryptocombination Knapp Daneben by KNT (on 26. March 2023, 15:26) | 25 |  98 % |
| Manhattan by starwarigami (on 10. October 2023, 10:59) | 14 | 95 % |
| No Mountains Allowed by Laake (on 19. November 2023, 23:52) | 15 | 93 % |
| Wichtel 2022 (9 und vorläufig Schluss): Die Wichtel in Pental by wichtel (on 1. December 2023, 23:23) | 11 | 98 % |
| Arrows to the gates of hell by damasosos92 (on 6. February 2024, 23:17) | 11 | 98 % |
| Regionometers by ThePedallingPianist (on 20. February 2024, 13:20) | 26 | 95 % |
| Shade Your Own Puzzle: YinYang vs Sudoku #1 by Playmaker6174 (on 20. August 2024, 19:00) | 54 | 94 % |
| Try-ominos by damasosos92 (on 26. September 2024, 20:37) | 38 | 98 % |
| Meidjuluk Fillomino Permaculture by Agent (on 27. June 2023, 09:00) | 79 | 98 % |
| Build-Your-Own Kropki Sudoku by The Book Wyrm (on 15. January 2024, 20:58) | 45 | 98 % |
| A Wonderful Discovery - Dedicated to Gliperal by damasosos92 (on 21. May 2023, 02:14) | 41 | 97 % |
| Broken Secrets by TotallyNormalCat (on 2. June 2021, 07:00) | 62 | 98 % |
| Too hot to hoot! - A Thermo Palindrome Sudoku by Philipp Huber (on 18. August 2020, 19:39) | 24 | 97 % |
| Fillomino Aquarium by Phistomefel (on 16. January 2022, 00:44) | 86 | 100 % |
| Advanced Kinematics (Projected Sum Arrow) by tallcat (on 6. April 2022, 20:08) | 34 | 91 % |
| Mean World Syndrome [Mean Arrow, Kropki] by Miky (on 1. May 2023, 17:29) | 35 | 96 % |
| Sandwich Product by Prof.Dori (on 5. July 2024, 09:28) | 36 | 95 % |
| Balanced Chaos by fritzdis (on 29. November 2022, 16:24) | 112 | 97 % |
| Wichtel 2015 (6): MERRY CHRISTMAS! by wichtel (on 18. May 2016, 20:15) | 41 | 99 % |
| Powercut [S-cell, Renban, RSL] by Christounet (on 30. June 2023, 23:48) | 38 | 100 % |
