(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 | |
|---|---|---|---|
 | No Wishing for More Wishes by ViKingPrime (on 10. September 2023, 02:00) | 11 |  98 % |
| Sightseeing (Aquapelago Chaos Deconstruction, 9x9) by thoughtbyte (on 11. September 2023, 10:49) | 27 | 94 % |
| MeidjulOOp ! [Meidjuluk N=18; Loop] by Christounet (on 25. October 2023, 21:54) | 43 | 99 % |
| Pentominophibian (Pentomino snake puzzle) by LilGungaJr (on 30. December 2023, 00:06) | 32 | 96 % |
| Dominoes in a fish tank by egubachu (on 23. April 2024, 20:03) | 47 | 91 % |
| Really, don't open the box by sanabas (on 7. July 2024, 14:43) | 13 | 93 % |
| X is the Key by Visumation (on 10. September 2024, 08:10) | 36 | 92 % |
| Cybranrules by Cybranrules (on 1. October 2024, 21:24) | 14 | 90 % |
| Boundaries by Playmaker6174 (on 16. November 2024, 02:00) | 90 | 96 % |
| Global entropy by asdfg (on 8. December 2024, 09:16) | 38 | 91 % |
| Duplexity by Sotehr (on 9. December 2024, 02:00) | 43 | 96 % |
| Little Deadly Construction by Myxo (on 21. December 2024, 12:32) | 114 | 99 % |
| Ascending Starters Sudoku, 2025 by clover (on 1. January 2025, 10:47) | 32 | 94 % |
| GPS Signal Lost by ChinStrap (on 16. February 2025, 18:31) | 28 | 97 % |
| Spiralling quadkis by Lorena (on 20. February 2025, 21:27) | 21 | 95 % |
| Into the arrowverse by DedaKosta (on 24. April 2025, 15:08) | 21 | 93 % |
| Befuddlement by Oddlyeven (on 8. July 2025, 03:01) | 151 | 98 % |
| Focus on Symmetry 2 by Mad-Tyas (on 19. August 2025, 20:17) | 79 | 94 % |
| Triumvirate by SamuPiano (on 23. September 2025, 15:44) | 36 | 91 % |
| Cavernous Japanese Sum: Deconstruction (9x9) by Playmaker6174 (on 21. November 2025, 15:00) | 23 | 100 % |
