(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 | |
|---|---|---|---|
 | 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) | 11 | 95 % |
| The Enchantments (GW loop Chaos Deconstruction) by SeveNateNine (on 26. July 2025, 20:55) | 26 | 99 % |
| Roller Coaster Nurikabe by the_cogito (on 24. February 2023, 19:32) | 90 | 98 % |
| Japanische Inseln, Krypto by pirx (on 28. February 2015, 17:00) | 28 | 99 % |
| Rollercoaster Deconstruction by tallcat (on 3. April 2023, 20:36) | 63 | 98 % |
| Deconstructing Mysterious Little Killers by Jeet Sampat (on 26. February 2024, 16:07) | 32 | 96 % |
| Killer Sudoku by ahaupt (on 30. June 2020, 12:15) | 57 | 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 % |
| El Psy Kongroo by lerroyy (on 21. July 2022, 04:00) | 38 | 97 % |
| Double Negative by DadJokes (on 4. October 2022, 13:35) | 18 | 91 % |
| Modern Wall by XeonRisq (on 29. March 2023, 19:00) | 17 | 98 % |
| Mods, Quads, Odds & Schröds by ThePedallingPianist (on 17. October 2023, 15:00) | 39 | 98 % |
| Vertigo Yajilin #2 by Piatato (on 7. May 2024, 17:47) | 18 | 98 % |
| Irma Vep by mathpesto (on 16. April 2025, 17:22) | 38 | 97 % |
| Chaotically Coordinated Arrows by Piatato (on 3. March 2022, 19:58) | 60 | 98 % |
| Greedy Cages Sudoku by Phistomefel (on 3. May 2022, 22:41) | 69 | 99 % |
| Crypto Japanese Cave (2) by KNT (on 13. October 2022, 23:25) | 63 | 100 % |
