(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 | |
|---|---|---|---|
 | Kitchen Nightmare (Sandwich Chaos Construction) by Tacosian (on 14. November 2023, 05:01) | 39 |  98 % |
| Chaos Pentominoes by Tacosian (on 9. March 2024, 23:14) | 44 | 94 % |
| Shade Your Own Puzzle: Fillomino vs Cave ft. Parity #2 (15x15) by Playmaker6174 (on 25. October 2024, 19:00) | 42 | 99 % |
| Khamodo Dragon (Japanese Sum Chaos Deconstruction) by MaizeGator (on 25. August 2025, 05:25) | 43 | 99 % |
| Hungarian Tapa / Roller Coaster (2) by KNT (on 28. September 2022, 16:37) | 37 | 98 % |
| Crossbeams (Little Killer) by Gliperal (on 7. October 2020, 02:25) | 36 | 98 % |
| Crossroads by TotallyNormalCat (on 16. January 2021, 03:00) | 39 | 98 % |
| Pet Shop Panic! by tesseralis (on 3. October 2022, 09:37) | 34 | 96 % |
| Siamese Coral (2) by KNT (on 9. March 2023, 00:10) | 37 | 96 % |
| Chaos Meidjudokuluk by tesseralis (on 14. October 2023, 07:19) | 34 | 100 % |
| Die Kryptos - S03E06: Hochhausblöcke by tuace (on 30. October 2018, 10:15) | 30 | 98 % |
| Hochhäuser in Japanischen Summen, Teil 2 by pirx (on 27. April 2017, 18:00) | 34 | 97 % |
| Greater Doppelganger by Kafkapharnaum (on 15. January 2022, 17:54) | 42 | 98 % |
| Palindrome Portals by TotallyNormalCat (on 1. January 2021, 23:00) | 42 | 91 % |
| Chaos Construction: Sightlines (2) by KNT (on 16. August 2022, 01:09) | 66 | 93 % |
| Derezzed by heliopolix (on 23. April 2024, 22:00) | 64 | 97 % |
| Rosette by Gliperal (on 26. August 2022, 02:43) | 28 | 95 % |
| Layla by mith (on 3. October 2022, 19:11) | 94 | 94 % |
| Wichtel 2022 (2): Die neue Wichtel-U-Bahn by wichtel (on 6. September 2023, 09:09) | 28 | 98 % |
| Wichtel 2016 (11): Frohe Weihnachten! by wichtel (on 1. October 2017, 22:00) | 26 | 92 % |
