(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 | |
|---|---|---|---|
 | 123...9 by Qodec (on 28. February 2021, 14:48) | 61 |  95 % |
| It being a weekend...(Disjoint Arrows Sudoku) by glum_hippo (on 15. August 2021, 05:00) | 31 | 96 % |
| Frankenstein by PotatoHead21 (on 6. November 2021, 13:40) | 27 | 97 % |
| Battle With The Archers - The Lost Puzzle: Partition by Playmaker6174 (on 29. January 2022, 18:05) | 30 | 98 % |
| The Miraculous Vault Construct by Xenonetix (on 23. March 2022, 13:15) | 27 | 99 % |
| Region Sums Sandwich by RockyRoer (on 9. April 2022, 13:56) | 32 | 95 % |
| Two Rights and a Wrogn by SirWoezel (on 20. July 2022, 21:57) | 32 | 94 % |
| Kongruenz-Rundweg mit Renban-Gruppen by ibag (on 21. March 2010, 19:43) | 31 | 90 % |
| Zeichenrundweg (4) by BFaw (on 30. June 2015, 09:00) | 28 | 93 % |
| Irregular Miracle by emmettcito (on 12. August 2020, 01:56) | 32 | 92 % |
| Teleportation Cycle Sum Sudoku (2) by SudokuExplorer (on 13. April 2021, 01:00) | 27 | 97 % |
| Roller Coaster mit Extras 24 by Uhu (on 5. October 2021, 14:00) | 26 | 99 % |
| The 8th Room by antiknight (on 24. July 2022, 22:50) | 32 | 95 % |
| [Fog of War Series] 3. Jumpgate Portals by AstralSky (on 28. October 2022, 05:51) | 73 | 93 % |
| Waves by antiknight (on 7. April 2023, 03:07) | 29 | 92 % |
| Second Look (Killer/Look-and-say cages) by AnalyticalNinja (on 12. June 2023, 23:12) | 30 | 95 % |
| Meander (Slitherlink/Japanese sums sudoku) by dumediat (on 11. August 2023, 12:25) | 29 | 97 % |
| Mady's Moonlander by Abdul the Killer (on 20. February 2024, 12:34) | 59 | 96 % |
| Rätselquadrat by usp (on 7. July 2014, 00:00) | 56 | 99 % |
| Battle With The Archers 24: Knight's Testimony by Playmaker6174 (on 10. December 2021, 10:29) | 53 | 93 % |
