(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 | |
|---|---|---|---|
 | Throuple Island by Belamis (on 26. October 2024, 21:23) | 34 |  91 % |
| U-Bahn with Empty Clues (Toroidal) (asst. the_cogito) by KNT (on 5. April 2025, 23:23) | 29 | 97 % |
| Osaka (Killer) by Florian Wortmann (on 3. July 2022, 17:14) | 65 | 99 % |
| Loes den (kleinen) Irrwisch! by ibag (on 23. July 2017, 08:25) | 29 | 99 % |
| WORTMISCHUNG - 3D Buchstabenrätsel / letter puzzle by DocLogic (on 26. January 2020, 00:52) | 32 | 98 % |
| Multi-color Madness! by esotericVideos (on 17. November 2021, 06:02) | 29 | 95 % |
| Cogito Ergo Santa by grkles (on 26. December 2022, 17:02) | 31 | 98 % |
| Quadrature by Jay Dyer (on 6. February 2023, 23:33) | 69 | 95 % |
| Houses of the Holy (arrows) by Godrick (on 26. July 2023, 18:46) | 31 | 98 % |
| TPC Sawgrass (Nurikabe/Loop 12 Hybrid) by MaizeGator (on 16. March 2025, 17:02) | 34 | 100 % |
| Split Squad (with ChinStrap) by Fenners (on 11. June 2025, 23:10) | 34 | 94 % |
| The Female of the Species... by Abdul the Killer (on 5. March 2024, 12:34) | 105 | 97 % |
| Little Killer Thermo Sudoku by Willy Wonka (on 30. September 2020, 23:40) | 64 | 98 % |
| Lattice by DVFrank (on 3. September 2021, 16:38) | 39 | 98 % |
| Eye of the Storm by NickSchneider (on 26. January 2022, 04:31) | 34 | 97 % |
| Fort Worth by ICHTUES (on 5. June 2022, 06:00) | 33 | 97 % |
| Slinningsbålet by Xenonetix (on 7. February 2023, 01:01) | 32 | 93 % |
| X-clusi-V-ty by tesseralis (on 12. August 2023, 02:26) | 31 | 95 % |
| Schrödinger 202: Atomic Structure by ViKingPrime (on 24. September 2023, 21:00) | 31 | 97 % |
| Rank Up 09 - Schrödinger by ThePedallingPianist (on 26. July 2024, 02:17) | 36 | 95 % |
