(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 | |
|---|---|---|---|
 | Cactus [German Whispers] by Malrog (on 8. January 2023, 01:56) | 34 |  93 % |
| Fisherman's Pinwheel by ClashCode (on 24. January 2023, 23:54) | 57 | 90 % |
| S-Thermo by Prof.Dori (on 11. May 2023, 12:42) | 31 | 93 % |
| Behaving Loop by ElChiglia (on 11. November 2023, 07:35) | 37 | 99 % |
| Pincer Movements by arbitrary (on 17. May 2024, 00:49) | 82 | 94 % |
| Oil, Water and Soap by ViKingPrime (on 30. July 2024, 00:00) | 26 | 95 % |
| Perfect by Jobo (on 9. November 2024, 00:28) | 60 | 92 % |
| Squiggles by Ratfinkz (on 30. November 2024, 20:38) | 54 | 97 % |
| five pointed stars, five lettered cells (Pentominous/Star Battle) by Nell Gwyn (on 18. February 2025, 20:18) | 26 | 100 % |
| Killeriana: Ungleichungskiller by Pyrrhon (on 8. October 2009, 14:35) | 91 | 96 % |
| Polka Dot by PotatoHead21 (on 26. March 2023, 18:47) | 107 | 94 % |
| Adventskalender 2020, Türchen 7 - Twilight-Tapa by Zzzyxas (on 7. December 2020, 07:00) | 79 | 98 % |
| HALLOWEEN - gruseliges Buchstabenrätsel by DocLogic (on 24. October 2020, 13:13) | 41 | 99 % |
| ABC-Box Skyscraper - From A Window by DiMono (on 18. August 2021, 18:58) | 40 | 99 % |
| Times Square by grkles (on 5. November 2021, 16:56) | 38 | 94 % |
| Very old burger (German Whisper + Kropki + Antiknight Sudoku) by Sktx (on 17. September 2022, 16:50) | 57 | 95 % |
| Nine Bent Arrows, One Straight by rmahus (on 14. March 2023, 10:00) | 47 | 97 % |
| City of Skyscrapers by Kitty Trouble (on 5. November 2023, 14:45) | 40 | 96 % |
| Pseudo Cluedo by marty_sears (on 6. April 2024, 01:13) | 99 | 98 % |
| Killer Gossip by Kaktuslav (on 6. October 2025, 08:00) | 42 | 94 % |
