(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 | |
|---|---|---|---|
 | CC: Red by lerroyy (on 2. August 2022, 23:07) | 21 |  91 % |
| Fillomino: Cryptic Differences #2 by Niverio (on 1. October 2022, 17:49) | 45 | 97 % |
| The Map by PotatoHead21 (on 21. December 2022, 07:19) | 25 | 96 % |
| Crusties ("Indexed Fives") by RockyRoer (on 21. July 2023, 20:01) | 45 | 96 % |
| Poison Pill Killer by JeffWajes (on 4. September 2023, 20:30) | 47 | 96 % |
| Remote Chaos by XeonRisq (on 4. January 2024, 19:00) | 21 | 96 % |
| The Colour out of Space (Advanced Black Hole) by heliopolix (on 31. March 2024, 22:23) | 21 | 93 % |
| Below Zero (Entropy Antimatter) by Mad-Tyas (on 20. April 2024, 10:52) | 26 | 90 % |
| Vertigo Yajilin #2 by Piatato (on 7. May 2024, 17:47) | 21 | 99 % |
| Aqropolis [Aqre Loop Japanese Sums Deconstruction] by Christounet (on 14. May 2024, 00:43) | 23 | 99 % |
| Candy Cane Cave [Secret Santa 2024] by Calesch (on 29. December 2024, 03:30) | 26 | 100 % |
| Odd-Even Encoded Skyscraper Sums by glum_hippo (on 9. April 2025, 02:14) | 24 | 94 % |
| Parhelion by Shinya (on 2. September 2021, 00:09) | 73 | 99 % |
| Wichtel 2014 (9): Weihnachtsbaum by wichtel (on 19. March 2015, 01:24) | 39 | 99 % |
| Operation Arrows by EliasKar (on 17. January 2021, 16:25) | 39 | 100 % |
| Chicago by ICHTUES (on 29. August 2021, 06:00) | 43 | 97 % |
| Cave / Directionless Yajilin Permaculture by Agent (on 21. August 2024, 09:00) | 41 | 97 % |
| Japanese Sums with Marked Cells (2) by KNT (on 13. February 2025, 22:30) | 39 | 97 % |
| Clashing Chameleons by the_cogito (on 1. May 2025, 18:24) | 39 | 96 % |
| Tonfa by Blashyrkh (on 14. April 2023, 09:41) | 39 | 95 % |
