(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 | |
|---|---|---|---|
 | 247, 368... by twototenth (on 26. September 2023, 08:00) | 24 |  93 % |
| vpermb by zzw (on 25. October 2023, 05:30) | 29 | 99 % |
| Pluto by lerroyy (on 3. December 2023, 00:24) | 27 | 96 % |
| Cosmogony by Kafkapharnaum (on 25. March 2024, 17:31) | 48 | 98 % |
| X (Chaos Construction) by tallcat (on 11. April 2024, 07:00) | 73 | 97 % |
| Yin Yang Sudoku Deconstruction [9x9] by Christounet (on 7. April 2024, 09:21) | 106 | 98 % |
| Schrödinger 302: Schrödinger's Octopus by ViKingPrime (on 5. May 2024, 11:45) | 37 | 97 % |
| Send In The Clones by Jay Dyer (on 25. September 2024, 23:03) | 34 | 94 % |
| Shade Your Own Puzzle: YinYang vs Sudoku #2 by Playmaker6174 (on 27. September 2024, 09:00) | 25 | 98 % |
| Chaotic Target Practice by KenGlue (on 11. November 2024, 20:04) | 44 | 98 % |
| Megascops Asio by Sniglett (on 21. February 2025, 01:39) | 18 | 98 % |
| blue lining white trenchcoat by aqjhs (on 19. May 2025, 00:24) | 32 | 95 % |
| Cage Play 6: Killer 357 Multiples by HalfBakedLunatic (on 18. May 2025, 17:50) | 21 | 94 % |
| Focus Point by oklux (on 1. December 2025, 10:12) | 26 | 93 % |
| Icewalk Sudoku by KNT (on 28. January 2026, 10:08) | 16 | 98 % |
| Antimatter by Nahileon (on 19. December 2022, 21:19) | 55 | 96 % |
| Order! Order! by IcyFruit (on 17. November 2023, 13:57) | 47 | 96 % |
| Unique by TotallyNormalCat (on 5. February 2021, 01:30) | 48 | 98 % |
| Order Out Of Chaos by zzw (on 16. November 2023, 00:45) | 43 | 100 % |
| Roller Coaster mit Extras 26 by Uhu (on 10. January 2025, 07:56) | 34 | 100 % |
