(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 | |
|---|---|---|---|
 | Campfire by Nahileon (on 12. January 2022, 21:24) | 55 |  97 % |
| A Little Deconstruction by djorr (on 14. April 2022, 14:00) | 29 | 93 % |
| Time to Think Outside the Box by zegres (on 1. March 2022, 06:49) | 56 | 98 % |
| Sudoku X Weirdity by Jeet Sampat (on 18. April 2022, 03:14) | 31 | 92 % |
| Portal Killer by crispy16 (on 11. June 2022, 04:29) | 28 | 96 % |
| Yin Yang Squares by Celery (on 21. January 2023, 00:04) | 30 | 95 % |
| Hybrid Star Battle Series (014) - Double Back by BenceJoful (on 13. April 2023, 16:17) | 32 | 94 % |
| Equal Sum Arrows by Sumanta(ANU) (on 7. June 2023, 11:21) | 29 | 93 % |
| Numbers in Cages in Regions in a 6x6 by PeterJoe (on 29. September 2023, 14:58) | 30 | 97 % |
| My First Squishdoku by EdTheAlchemist (on 29. April 2026, 10:10) | 30 | 95 % |
| Nexus [Fog of War Sudoku] by wisty (on 6. March 2023, 02:14) | 91 | 91 % |
| Message in a bottle by NicoD (on 10. July 2025, 05:30) | 78 | 95 % |
| Cycles of Time and Tide by zetamath (on 6. July 2025, 00:38) | 126 | 97 % |
| Milchstraße (Sektor 23F) by usp (on 5. November 2014, 00:00) | 48 | 98 % |
| XV*Magic 4 by NurglesGift (on 21. December 2024, 13:33) | 156 | 96 % |
| CTC U-Bahn Guest Series Extras: Extra Region U-Bahn by KNT (on 19. May 2025, 11:54) | 45 | 97 % |
| Milestones by marty_sears (on 5. October 2024, 19:14) | 184 | 98 % |
| Colours in the (k)night XX by Villse (on 22. December 2025, 14:23) | 202 | 96 % |
| Easter Eggs by Jobo (on 31. March 2024, 09:09) | 66 | 98 % |
| Petit Pois by ThePedallingPianist (on 7. May 2025, 10:55) | 70 | 94 % |
