(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 | |
|---|---|---|---|
 | Gridlock by FryTheGuy (on 14. November 2021, 01:13) | 21 |  98 % |
| Tight Fit by TotallyNormalCat (on 30. December 2021, 19:00) | 53 | 98 % |
| Wichtel 2020 (4): Memo an den Weihnachtsmann by wichtel (on 27. April 2021, 02:02) | 13 | 98 % |
| Possimpible by Jeet Sampat (on 5. November 2021, 06:19) | 14 | 92 % |
| Eye of the Storm by TotallyNormalCat (on 11. February 2022, 22:00) | 49 | 97 % |
| Halligen Knapp Daneben by KNT (on 12. January 2023, 01:08) | 28 | 100 % |
| Sandwich gone BAD by PrimeWeasel (on 3. March 2023, 17:59) | 13 | 100 % |
| Wichtel 2022 (6): Das Kleckskakuro by wichtel (on 4. October 2023, 13:13) | 14 | 98 % |
| Liar Japanese Sums #8 - Ciphered Deconstruction by Niverio (on 4. June 2024, 08:48) | 33 | 100 % |
| A Map to Distant Lands by The Book Wyrm (on 23. August 2024, 18:11) | 14 | 92 % |
| [Fog of War Series] 11.Misty Doublers by AstralSky (on 9. December 2022, 09:00) | 45 | 91 % |
| Colossal Nurikabe Sudoku by Christounet (on 13. June 2023, 00:47) | 38 | 100 % |
| Syzygy Stardust by David BOWie by mith (on 11. April 2022, 21:48) | 24 | 95 % |
| TE-N [Liar JSCC Ten Line] by Christounet (on 4. July 2024, 14:55) | 21 | 99 % |
| Bubble Trouble by Stavros96 (on 16. March 2021, 12:01) | 30 | 98 % |
| Thermodynamics (Thermo, Entropy) by Mad-Tyas (on 13. March 2023, 09:36) | 35 | 92 % |
| Goliath by Jay Dyer (on 25. July 2023, 16:03) | 32 | 97 % |
| Mods, Quads, Odds & Schröds by ThePedallingPianist (on 17. October 2023, 15:00) | 31 | 97 % |
| Soap Opera by Jay Dyer (on 28. January 2024, 21:19) | 28 | 97 % |
| SET PIECE [Multiset Sudoku] by wisty (on 21. November 2023, 17:55) | 37 | 97 % |
