(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 | |
|---|---|---|---|
 | Slinningsbålet by Xenonetix (on 7. February 2023, 01:01) | 30 |  92 % |
| Houses of the Holy (arrows) by Godrick (on 26. July 2023, 18:46) | 30 | 98 % |
| MasyU-Bahn (Teil 3) by Zzzyxas (on 2. April 2015, 20:35) | 59 | 99 % |
| Loes den (kleinen) Irrwisch! by ibag (on 23. July 2017, 08:25) | 29 | 99 % |
| Scaffolding (Arrow Sudoku) by emmettcito (on 24. April 2021, 21:24) | 36 | 96 % |
| Whispering Arrows by abed hawila (on 9. July 2021, 06:00) | 32 | 97 % |
| Little Killer by PotatoHead21 (on 17. October 2021, 09:59) | 35 | 95 % |
| Multi-color Madness! by esotericVideos (on 17. November 2021, 06:02) | 28 | 95 % |
| Eye of the Storm by NickSchneider (on 26. January 2022, 04:31) | 31 | 97 % |
| Cogito Ergo Santa by grkles (on 26. December 2022, 17:02) | 31 | 98 % |
| U-Bahn with Cages by wooferzfg (on 26. April 2023, 23:39) | 31 | 99 % |
| Lattice by DVFrank (on 3. September 2021, 16:38) | 39 | 98 % |
| Maggot Sandwich by Piatato (on 8. August 2022, 11:07) | 29 | 96 % |
| Cipher Hungarian Tapa by the_cogito (on 5. April 2023, 21:49) | 32 | 94 % |
| Dotropy (Entropic sudoku with kropki pairs) by Qodec (on 14. May 2023, 17:30) | 70 | 95 % |
| X-clusi-V-ty by tesseralis (on 12. August 2023, 02:26) | 31 | 95 % |
| Zipper Galaxies by gdc (on 4. February 2024, 18:44) | 38 | 98 % |
| Halving Loop by yttrio (on 19. April 2024, 14:46) | 32 | 95 % |
| Modscrapers by grkles (on 15. November 2021, 04:28) | 34 | 99 % |
| Primesweeper: Strongbox by grkles (on 3. December 2021, 18:42) | 33 | 97 % |
