(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 | |
|---|---|---|---|
 | Crate Cave by KNT (on 16. January 2026, 19:29) | 40 |  96 % |
| Crab Net (with Math Pesto) by Paletron (on 29. October 2024, 11:42) | 32 | 96 % |
| Killer Turm by tuace (on 17. November 2013, 09:30) | 46 | 98 % |
| Ten Knights by FryTheGuy (on 20. August 2021, 08:16) | 139 | 97 % |
| Yin-Yang Territories by masetab (on 3. January 2026, 13:01) | 95 | 100 % |
| Rivers and Islands Fillomino by Jesper (on 19. October 2020, 10:04) | 55 | 98 % |
| Ten-Ban by Niverio (on 13. January 2023, 14:54) | 61 | 97 % |
| Elementary by Christounet (on 18. September 2023, 22:30) | 57 | 98 % |
| The Barbed Cross by SSG (on 30. June 2021, 11:26) | 15 | 92 % |
| Diagonal Spiral by antiknight (on 6. July 2022, 22:35) | 36 | 93 % |
| Shading Sudoku Collection by KNT (on 10. August 2022, 05:09) | 44 | 97 % |
| Cryptocombination Knapp Daneben by KNT (on 26. March 2023, 15:26) | 30 | 98 % |
| Chaos Construction: Exclusions by KNT (on 1. May 2024, 18:08) | 138 | 92 % |
| Arcade (Pentopia + Simple Loop) by sfushidahardy (on 17. November 2024, 01:03) | 35 | 97 % |
| [TSL][S1T2] Adrift, not aimless...Uncertain, not lost (Nurimaze/Taj Mahal) by dumediat (on 22. December 2024, 13:30) | 14 | 96 % |
| [TSL][S1T2] At the Edge of the Future (Variant Foreshadow) by The Book Wyrm (on 14. January 2025, 02:33) | 15 | 98 % |
| Railroaded by someguy209 (on 31. January 2025, 23:33) | 14 | 94 % |
| Toei Subway by Myxo (on 19. February 2025, 14:05) | 34 | 100 % |
| Split the Difference by Scojo (on 27. November 2025, 07:49) | 22 | 96 % |
| Bounded Territories by masetab (on 13. March 2026, 15:39) | 21 | 94 % |
