(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 | |
|---|---|---|---|
 | Near and far (Kropki pairs/Remote sums/X-sums) by dumediat (on 26. May 2023, 13:54) | 28 |  98 % |
| I Made A Pencil Puzzle: Ciphered Tapa (18x18) by Playmaker6174 (on 12. December 2023, 11:00) | 26 | 97 % |
| Wichtel 2016 (10): Kakuro-Hitori by wichtel (on 13. September 2017, 02:02) | 55 | 96 % |
| WORTMISCHUNG - 3D Buchstabenrätsel / letter puzzle by DocLogic (on 26. January 2020, 00:52) | 31 | 98 % |
| Scaffolding (Arrow Sudoku) by emmettcito (on 24. April 2021, 21:24) | 35 | 96 % |
| Double-or-nothing by tesseralis (on 13. August 2022, 09:30) | 29 | 95 % |
| Cogito Ergo Santa by grkles (on 26. December 2022, 17:02) | 30 | 98 % |
| 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 % |
| Square Dance by Jay Dyer (on 9. July 2024, 22:47) | 68 | 96 % |
| Donuts [Killer] by Malrog (on 8. October 2024, 00:55) | 34 | 93 % |
| Wrench Heads (Chaos Construction) by Agent (on 26. May 2022, 09:00) | 94 | 98 % |
| MasyU-Bahn (Teil 3) by Zzzyxas (on 2. April 2015, 20:35) | 58 | 99 % |
| Loes den (kleinen) Irrwisch! by ibag (on 23. July 2017, 08:25) | 29 | 99 % |
| Little Killer by PotatoHead21 (on 17. October 2021, 09:59) | 35 | 95 % |
| Eye of the Storm by NickSchneider (on 26. January 2022, 04:31) | 31 | 97 % |
| Maggot Sandwich by Piatato (on 8. August 2022, 11:07) | 28 | 96 % |
| U-Bahn with Cages by wooferzfg (on 26. April 2023, 23:39) | 30 | 99 % |
| Halving Loop by yttrio (on 19. April 2024, 14:46) | 31 | 95 % |
| Saturn's Moons by cristophermoore (on 9. June 2022, 00:25) | 64 | 100 % |
