(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 | |
|---|---|---|---|
 | Fahrenheit's Vision by Xenonetix (on 11. July 2022, 22:22) | 52 |  99 % |
| Arrow Battle by 10feet (on 25. November 2022, 06:42) | 14 | 95 % |
| Nabner Doubledeal by Jay Dyer (on 20. September 2023, 13:35) | 52 | 97 % |
| SET PIECE [Multiset Sudoku] by wisty (on 21. November 2023, 17:55) | 40 | 96 % |
| The Method of Differences by DarthParadox (on 16. December 2023, 21:06) | 28 | 95 % |
| Liar Japanese Sums #8 - Ciphered Deconstruction by Niverio (on 4. June 2024, 08:48) | 43 | 100 % |
| A Map to Distant Lands by The Book Wyrm (on 23. August 2024, 18:11) | 27 | 95 % |
| Abstruse by Andrewsarchus (on 28. September 2024, 23:11) | 12 | 93 % |
| Dorlightfully Devilish by ThePedallingPianist (on 2. November 2024, 20:11) | 14 | 95 % |
| [TSL][S1T2] Adrift, not aimless...Uncertain, not lost (Nurimaze/Taj Mahal) by dumediat (on 22. December 2024, 13:30) | 12 | 95 % |
| Irma Vep by mathpesto (on 16. April 2025, 17:22) | 39 | 97 % |
| Melancholia (Build your own arrow) by Sartor (on 15. June 2024, 23:05) | 49 | 99 % |
| Loop Nurikabe by wooferzfg (on 2. February 2023, 16:31) | 113 | 98 % |
| Japanische Inseln, Krypto by pirx (on 28. February 2015, 17:00) | 28 | 99 % |
| Junction by grkles (on 22. May 2021, 03:53) | 28 | 99 % |
| Space Mountain by IcyFruit (on 1. December 2023, 22:12) | 30 | 97 % |
| Killer Sudoku by ahaupt (on 30. June 2020, 12:15) | 58 | 96 % |
| Disjoint Little Killer Sudoku - 89 Spinning Tops by DiMono (on 6. December 2020, 18:50) | 20 | 95 % |
| Krop Kages by Philipp Huber (on 13. February 2021, 22:44) | 18 | 98 % |
| Magic Arrows by PotatoHead21 (on 3. September 2021, 04:34) | 20 | 97 % |
