(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 | |
|---|---|---|---|
 | Absolute Chaos by Fenners (on 8. April 2025, 12:47) | 113 |  96 % |
| Galaxy Killer Sudoku by Phistomefel (on 11. May 2020, 11:33) | 111 | 96 % |
| Sandwich/Killer Sudoku - Find x Part 3 by ProwlingTiger (on 27. May 2020, 20:00) | 27 | 94 % |
| The Box by FryTheGuy (on 2. November 2021, 02:22) | 26 | 93 % |
| Precision (Equalines, Doubler) by Mad-Tyas (on 25. April 2023, 09:32) | 24 | 95 % |
| Three Fluids (Nurikabe) by GemmaOane (on 23. September 2023, 20:25) | 30 | 93 % |
| Reflections by EricRathbun (on 1. July 2024, 15:13) | 56 | 96 % |
| Cage Match by silent_rob (on 29. July 2024, 08:00) | 29 | 93 % |
| Skropki Dots 17 by Christounet (on 24. December 2024, 09:46) | 23 | 99 % |
| Chainsaw by chameleon (on 22. April 2025, 09:10) | 27 | 95 % |
| please, can we keep him!? by aqjhs (on 22. May 2025, 08:43) | 26 | 98 % |
| The lost oriel by NicoD (on 30. May 2025, 05:30) | 32 | 93 % |
| Up to Nosferatu (with ChinStrap) by sujoyku (on 31. October 2025, 10:00) | 26 | 99 % |
| Wichtel 2011 (2): Ein Sack voller Flöhe by wichtel (on 12. January 2012, 09:00) | 58 | 98 % |
| June Pentomino Month (3) - Filled Liar Loop by Richard (on 21. June 2013, 12:00) | 54 | 97 % |
| Everything is Stavros96 (Palindrome Killer) by Stavros96 (on 14. January 2021, 07:51) | 63 | 98 % |
| Baltimore by ICHTUES (on 2. January 2022, 06:00) | 60 | 96 % |
| Tannenbaumino by cristophermoore (on 19. December 2023, 02:10) | 56 | 93 % |
| Five Fish by SXH (on 28. November 2024, 02:57) | 135 | 95 % |
| Regal executioner by NicoD (on 28. March 2026, 10:23) | 64 | 94 % |
