(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 | |
|---|---|---|---|
 | Numbered Rooms Sudoku by Qodec (on 24. January 2022, 19:19) | 125 |  97 % |
| Wack by the_cogito (on 22. May 2022, 16:34) | 27 | 99 % |
| Rorschach (Thermo) by tallcat (on 23. June 2022, 17:06) | 68 | 95 % |
| The Lost Woods (BotW tribute) by MSDOS (on 3. July 2024, 07:47) | 38 | 94 % |
| Wichtels Rätselsommer 2024 (1): Bahnlinienplanung im Wunderwald by wichtel (on 11. August 2024, 20:23) | 31 | 100 % |
| Seer (Chaos Construction) by sfushidahardy (on 11. October 2024, 04:24) | 60 | 98 % |
| Kurtosis by juggler (on 19. August 2025, 23:45) | 73 | 91 % |
| Island Sum Lines by yttrio (on 1. November 2025, 00:22) | 166 | 98 % |
| Lion (Non-touching killer sudoku) by Qodec (on 18. May 2022, 11:58) | 115 | 94 % |
| Japanische Summen - Doppelrätsel mit Primzahlen by ibag (on 27. April 2012, 11:49) | 70 | 99 % |
| So oder so: Koralle mit Doppelsternen by CHalb (on 30. July 2015, 16:24) | 42 | 97 % |
| Jealousy by mith (on 7. March 2022, 20:22) | 50 | 96 % |
| Quint Quads by Ned Howarth (on 29. June 2022, 09:55) | 44 | 93 % |
| Skate by dead_homer (on 19. May 2024, 00:25) | 42 | 92 % |
| Horseshoes by Kaktuslav (on 29. November 2025, 08:00) | 43 | 93 % |
| The Pairrow's Surveyors by Andrewsarchus (on 14. January 2026, 06:30) | 43 | 98 % |
| Kakuro-Suguru Chaos Construction by mathpesto (on 25. January 2023, 20:05) | 96 | 97 % |
| Schwarz oder Weiß Koralle III by tuace (on 4. October 2015, 17:09) | 47 | 96 % |
| Line of Sight (9x9 Chaos Construction) by ONeill (on 22. October 2022, 02:01) | 57 | 99 % |
| Deconstructed Fog by DiMono (on 11. September 2024, 19:24) | 50 | 94 % |
