(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 | |
|---|---|---|---|
 | Directed Entropy by egubachu (on 11. June 2025, 22:11) | 19 |  90 % |
| Tenuity (Japanese sums/Pentomino chain) by dumediat (on 14. September 2025, 15:03) | 14 | 100 % |
 | [PAC] Cipher JS Clone Sudoku by TVDK (on 20. September 2025, 13:56) | 20 | 93 % |
| Reign of Arrows (Anti-knight, Arrows) by juddimal (on 8. January 2025, 02:53) | 89 | 95 % |
| Unique Values by Mesmer (on 25. January 2021, 12:20) | 65 | 99 % |
| Cave Akari by Mark Sweep (on 4. December 2020, 10:00) | 58 | 99 % |
| Roller Coaster mit Extras 11 by Uhu (on 11. October 2018, 18:15) | 53 | 97 % |
| DIY Arrows by sophmayrob (on 15. June 2023, 07:59) | 54 | 98 % |
| Glyphs #5 by damasosos92 (on 23. February 2023, 23:55) | 52 | 97 % |
| Adventskalender 2023, Türchen 9 - Glashochhäuser by Zzzyxas (on 9. December 2023, 07:00) | 48 | 99 % |
| Everything in its Right Place by marty_sears (on 16. October 2023, 01:53) | 99 | 99 % |
| The Nuts by juggler (on 8. July 2025, 23:44) | 47 | 95 % |
| Half Life (Yin Yang Deconstruction) by Agent (on 30. August 2022, 09:00) | 83 | 99 % |
| Thermo + Killer + Anti-Knight by stimim (on 30. July 2020, 17:38) | 96 | 98 % |
| Chalice (Anti-knight, Thermo) by emmettcito (on 23. April 2021, 19:21) | 47 | 93 % |
| Little Kropkiller by Mark Sweep (on 13. November 2020, 10:00) | 41 | 96 % |
| Nineteen by FryTheGuy (on 29. November 2021, 16:51) | 40 | 94 % |
| Whispering Tapa-logy by yttrio (on 19. January 2024, 22:10) | 36 | 97 % |
| X---V*4 by NurglesGift (on 11. April 2025, 06:00) | 87 | 97 % |
| Deconstruction Chaos Suguru #1,729: It’s All a Lie! by mathpesto (on 2. April 2022, 20:58) | 119 | 99 % |
