(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 | |
|---|---|---|---|
 | Murmuration (Little Killer) by emmettcito (on 31. March 2021, 19:38) | 31 |  97 % |
| Toothbrushes by krangune (on 8. May 2022, 12:49) | 32 | 97 % |
| Lucky (Symmetrical Palindromic Arrows) by AnalyticalNinja (on 26. July 2022, 23:55) | 33 | 97 % |
| 2many arrows spoil the box by tesseralis (on 27. August 2022, 07:31) | 96 | 96 % |
| Odd Blockade Runners 2 by JeffWajes (on 1. May 2023, 19:18) | 34 | 95 % |
| Brötchenstempel by Myxo (on 12. March 2024, 10:24) | 32 | 97 % |
| Would you like that toasted? by vitaminz (on 10. July 2024, 03:21) | 33 | 92 % |
| Cavalry Archer (Anti-Knight Arrow Sudoku) by Phistomefel (on 2. June 2021, 21:09) | 174 | 97 % |
| Yin-Yang Sudoku by Phistomefel (on 12. December 2020, 20:26) | 67 | 97 % |
| Gouge Away by mathpesto (on 7. April 2024, 17:31) | 139 | 97 % |
| Adventskalender-ABCtje by StefanSch (on 30. November 2012, 00:00) | 34 | 91 % |
| Forwards & Backwards by zetamath (on 12. July 2021, 23:43) | 44 | 92 % |
| Chocolate Banana Sandwiches by Scojo (on 1. August 2023, 07:53) | 40 | 98 % |
| Knights in Cages by Bert (on 29. January 2024, 16:41) | 45 | 96 % |
| Wichtel 2013 (11 und Schluss): Schwere Entscheidung by wichtel (on 17. June 2014, 13:20) | 40 | 95 % |
| Hurray for René by Richard (on 9. January 2021, 00:00) | 51 | 96 % |
| The Dirty Dozen by twototenth (on 28. June 2022, 08:00) | 51 | 97 % |
| Säntis (collab with ICHTUES) by Florian Wortmann (on 25. October 2023, 20:05) | 119 | 96 % |
| Jubiläumsrätsel - 2 Jahre Rätselportal by Richard (on 1. November 2010, 00:00) | 70 | 94 % |
| Partial Killer I "Windmühle" by glum_hippo (on 18. September 2020, 18:15) | 78 | 96 % |
