(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 | |
|---|---|---|---|
 | Just between the N of us by Sktx (on 4. June 2021, 12:38) | 12 |  98 % |
| Ninelives [X-Sums Chaos Construction] by Panthera (on 22. June 2021, 19:30) | 20 | 100 % |
| Pitchfork Emporium by FryTheGuy (on 21. December 2021, 04:10) | 27 | 95 % |
| The Gap by ICHTUES (on 5. December 2021, 06:00) | 19 | 90 % |
| Grid Dancing by Bremster (on 4. June 2022, 05:52) | 49 | 98 % |
| Fillomino: Cryptic Differences #2 by Niverio (on 1. October 2022, 17:49) | 42 | 100 % |
| Sudoku O.W.L. by Nahileon (on 10. October 2022, 21:25) | 20 | 100 % |
| Confetti by Ennead (on 17. September 2023, 16:38) | 23 | 100 % |
| The False Tautology (Zippular Lines #5) by heliopolix (on 12. February 2024, 21:16) | 13 | 96 % |
| Build Your Own Nuri-Maze #3: Crossing Slitherlink by Myxo (on 22. February 2024, 14:43) | 16 | 96 % |
| Double Loop Japanese Sums by Agent (on 26. February 2024, 09:00) | 23 | 94 % |
| Deconstructing Mysterious Little Killers by Jeet Sampat (on 26. February 2024, 16:07) | 28 | 98 % |
| Wichtels Rätselsommer 2024 (6): Ein seltsamer Mischmasch by wichtel (on 9. September 2024, 20:23) | 19 | 100 % |
| Chaos Deconstruction: Sightlines by KNT (on 11. June 2023, 00:07) | 78 | 98 % |
| On Repeat by mathpesto (on 14. March 2022, 01:14) | 57 | 100 % |
| Eye of the Storm by TotallyNormalCat (on 11. February 2022, 22:00) | 52 | 97 % |
| Crypto Japanese Twilight Cave by KNT (on 23. October 2022, 06:02) | 48 | 99 % |
| TENtropy by Mad-Tyas (on 9. May 2023, 09:02) | 44 | 95 % |
| Chaos Deconstruction: Double Snake by KNT (on 25. July 2022, 03:25) | 36 | 97 % |
| Liar Japanese Sums #8 - Ciphered Deconstruction by Niverio (on 4. June 2024, 08:48) | 38 | 100 % |
