(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 | |
|---|---|---|---|
 | 1-N Chaos Deconstruction: Whisper / Renban / Between by KNT (on 14. May 2022, 16:49) | 52 |  97 % |
| Make Room by Jay Dyer (on 5. July 2023, 00:36) | 29 | 97 % |
| Crypto Rotating Japanese Pentopia with Skyscrapers for ibag by KNT (on 10. July 2023, 00:51) | 26 | 99 % |
| Donuts by Die Hard (on 26. October 2023, 03:30) | 27 | 100 % |
| LM 2017 Reste: Achterbahn (ohne Sicherheitsgurte) by pwahs (on 14. April 2017, 10:00) | 34 | 99 % |
| Obvious Killer by filuta (on 29. March 2021, 11:31) | 32 | 97 % |
| Roller Coaster Nurikabe by the_cogito (on 24. February 2023, 19:32) | 85 | 98 % |
| Fireworks (Killer Arrow Sudoku) by FryTheGuy (on 2. June 2021, 07:12) | 18 | 91 % |
| Couples by kolot (on 28. July 2021, 14:07) | 29 | 94 % |
| Wanda's Hex by fjam (on 25. September 2021, 11:00) | 15 | 96 % |
| Syzygy Stardust by David BOWie by mith (on 11. April 2022, 21:48) | 27 | 95 % |
| Knot in the Crosshairs by antiknight (on 13. December 2022, 23:40) | 27 | 96 % |
| Trimodi (Modifier Entropy) by Mad-Tyas (on 10. January 2023, 00:48) | 18 | 95 % |
| Goliath by Jay Dyer (on 25. July 2023, 16:03) | 36 | 97 % |
| A Flock of Pixels (Colourful Killers) by The Book Wyrm (on 27. August 2023, 15:56) | 15 | 98 % |
| Wichtel 2022 (4): Traditionelle Japanische Summe by wichtel (on 20. September 2023, 11:11) | 15 | 100 % |
| Uncopyrightable Cavino by PrimeWeasel (on 5. September 2024, 22:48) | 26 | 100 % |
| Tetropolis by sfushidahardy (on 4. October 2024, 17:18) | 26 | 99 % |
| [TSL][S1T1] Prestige (full rank, modifiers) by The Book Wyrm (on 13. October 2024, 18:00) | 15 | 91 % |
| Tight Fit by TotallyNormalCat (on 30. December 2021, 19:00) | 56 | 98 % |
