(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 | |
|---|---|---|---|
 | Powercut [S-cell, Renban, RSL] by Christounet (on 30. June 2023, 23:48) | 39 |  100 % |
| Japanese Cave by KNT (on 29. August 2022, 05:29) | 48 | 99 % |
| Broken Secrets by TotallyNormalCat (on 2. June 2021, 07:00) | 65 | 98 % |
| Di-agony! by ThePedallingPianist (on 24. November 2022, 17:07) | 66 | 97 % |
| The 4-Colour Theorem by starwarigami (on 5. February 2023, 10:00) | 76 | 96 % |
| Evil Eyes 4 v. 4 by Luigi (on 17. June 2010, 14:45) | 19 | 97 % |
| Roller Coaster mit Extras 17 by Uhu (on 9. April 2020, 20:36) | 37 | 99 % |
| Adventskalender 2020, Finale - Riesenrundweg by Zzzyxas (on 1. December 2020, 07:00) | 26 | 100 % |
| Snake Sum Sudoku 5 by Quarterthru (on 11. July 2020, 20:00) | 24 | 97 % |
| Where are the cage totals? - Odd/Even killer sudoku (#5) by Mr.Menace (on 2. February 2021, 10:12) | 32 | 95 % |
| The Devil's Arrow by PotatoHead21 (on 6. June 2021, 06:51) | 20 | 92 % |
| Silvester by PulverizingPancake (on 24. January 2022, 02:00) | 40 | 98 % |
| Schrödinger Sudkuro by ICHTUES (on 30. October 2022, 06:00) | 47 | 98 % |
| Disambiguation by Flywinged (on 5. February 2023, 01:07) | 21 | 92 % |
| Fillomino Yajilin (10x10) by ns08 (on 8. May 2023, 00:01) | 23 | 95 % |
| Proximity (Renban/Antiknight) by dumediat (on 13. May 2023, 14:29) | 72 | 93 % |
| Nothing to see here by fritzdis (on 31. August 2023, 09:36) | 34 | 98 % |
| [159] Di-Again-y! by ThePedallingPianist (on 11. October 2023, 01:47) | 19 | 90 % |
| Wichtels Rätselsommer 2024 (3): Diebische Wichtel by wichtel (on 17. August 2024, 20:23) | 18 | 98 % |
| Medieval Buffet by Manta-Ray (on 16. September 2024, 14:11) | 31 | 95 % |
