(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 | |
|---|---|---|---|
 | Disam Bonkers by ICHTUES (on 1. January 2023, 06:00) | 21 |  96 % |
| Remote Chaos by XeonRisq (on 4. January 2024, 19:00) | 20 | 96 % |
| The Colour out of Space (Advanced Black Hole) by heliopolix (on 31. March 2024, 22:23) | 19 | 93 % |
| Aqropolis [Aqre Loop Japanese Sums Deconstruction] by Christounet (on 14. May 2024, 00:43) | 22 | 99 % |
| Same Old Same Old by MathGuy_12 (on 18. July 2025, 23:23) | 42 | 97 % |
| Asterias (Pentopia U-Bahn) by MaizeGator (on 22. July 2025, 05:19) | 22 | 100 % |
| Pfeilchenbeet / Arrow Farm by Phistomefel (on 17. November 2020, 20:01) | 53 | 99 % |
| Ancient Tablet by Kafkapharnaum (on 25. July 2023, 15:51) | 29 | 100 % |
| A Whole Bunch of Nonsense by Myxo (on 30. October 2023, 22:00) | 71 | 95 % |
| Operation Arrows by EliasKar (on 17. January 2021, 16:25) | 36 | 100 % |
| Fillomino 77 by Myxo (on 1. August 2023, 13:15) | 39 | 97 % |
| Nagaraja [Japanese Sums Cipher Snake Deconstruction] by Christounet (on 12. April 2024, 21:38) | 39 | 98 % |
| Japanese Sums with Marked Cells (2) by KNT (on 13. February 2025, 22:30) | 37 | 97 % |
| Shindig Redone 2 (Anti-Knight, Renban) by juddimal (on 18. April 2025, 07:09) | 43 | 95 % |
| Clashing Chameleons by the_cogito (on 1. May 2025, 18:24) | 37 | 96 % |
| Fairy Rings by Jay Dyer (on 1. January 2022, 20:17) | 51 | 98 % |
| Glass Skyscraper Sudoku(P1) by cdwg2000 (on 21. September 2020, 10:20) | 16 | 96 % |
| Strange Loop by Andrewsarchus (on 28. September 2021, 16:33) | 48 | 98 % |
| Lügende Rundwege / Slitherlink Liars by Phistomefel (on 21. March 2022, 12:15) | 32 | 99 % |
| Wichtel 2021 (5): Fehlkommunikation by wichtel (on 12. August 2022, 20:21) | 22 | 99 % |
