(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 | |
|---|---|---|---|
 | Zahlen nach Malen / Numbers by paint by olima (on 10. June 2022, 16:16) | 20 |  97 % |
| Psycho Dominoes by Allagem (on 9. January 2023, 00:53) | 21 | 94 % |
| Cross-Stitch Monster by virtual (on 27. July 2023, 03:07) | 20 | 99 % |
| Diarrowgonal by LeaVulpina (on 17. January 2024, 16:19) | 43 | 95 % |
| Et Tu Brute? by Scojo (on 19. March 2024, 14:04) | 39 | 94 % |
| EntROPEy by Mad-Tyas (on 2. May 2024, 05:47) | 23 | 94 % |
| Parity Renban by Oddlyeven (on 4. February 2023, 18:16) | 61 | 95 % |
| Heated Entropic Loop by yttrio (on 23. February 2024, 20:12) | 55 | 96 % |
| Ben Nevis (Killer) by tallcat (on 30. December 2023, 13:50) | 92 | 96 % |
| Arrows, XVs, and Dots by kolot (on 26. August 2021, 09:41) | 42 | 94 % |
| Distorted Reflections by meggen033 (on 10. March 2024, 14:46) | 47 | 93 % |
| Wichtel 2017 (6): Easy as Kakuro by wichtel (on 22. June 2018, 10:04) | 56 | 97 % |
| Killers 123...go by abed hawila (on 21. May 2021, 09:02) | 56 | 95 % |
| Instructionless by Jesper (on 8. December 2021, 09:27) | 50 | 98 % |
| 3etween 2 (Between lines sudoku) by Qodec (on 5. November 2022, 11:32) | 58 | 96 % |
| Pseudo Differences by marty_sears (on 20. February 2024, 21:00) | 62 | 99 % |
| Hitchcocks Krypto ABCtje by tuace (on 29. September 2014, 11:55) | 31 | 95 % |
| 9x9 Fillomino Skyscrapers by Jesper (on 10. August 2020, 22:28) | 46 | 96 % |
| 2021 by RockyRoer (on 31. December 2020, 00:00) | 47 | 93 % |
| Coprime Directive by cristophermoore (on 12. March 2021, 07:20) | 17 | 93 % |
