(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 | |
|---|---|---|---|
 | Constructing a Murder Scene - Chaos Construction (Killer) by Mr.Menace (on 27. July 2022, 13:28) | 88 |  97 % |
| Peregrine (13x13 Chaos Deconstruction) by Xendari (on 30. April 2023, 16:27) | 45 | 100 % |
| Crypto Japanese Slitherlink by KNT (on 12. November 2022, 22:43) | 58 | 98 % |
| Yin Yang Sudoku Deconstruction [9x9] by Christounet (on 7. April 2024, 09:21) | 101 | 97 % |
| Japanische Summen-Koralle Knapp Daneben by Uhu (on 16. January 2017, 21:18) | 48 | 98 % |
| Tonfa by Blashyrkh (on 14. April 2023, 09:41) | 38 | 95 % |
| Sackgassen by Myxo (on 15. August 2023, 05:27) | 36 | 96 % |
| Kakuro S-Cells Loop Knapp Daneben Jigsaw [Secret Satan #2] by Christounet (on 30. January 2024, 18:55) | 16 | 98 % |
| Cosmogony by Kafkapharnaum (on 25. March 2024, 17:31) | 43 | 99 % |
| Schrödinger 302: Schrödinger's Octopus by ViKingPrime (on 5. May 2024, 11:45) | 33 | 97 % |
| Candy Cane Cave [Secret Santa 2024] by Calesch (on 29. December 2024, 03:30) | 20 | 100 % |
| Scorpion by IcyFruit (on 31. January 2025, 14:18) | 35 | 92 % |
| Nostalgia (Build your own Arrow) by Sartor (on 3. August 2025, 18:29) | 16 | 93 % |
| Now the People Will Know We Were Here by ViKingPrime (on 17. April 2024, 16:15) | 49 | 98 % |
| Fat X Little Killer Sudoku by Aspartagcus (on 31. August 2020, 10:20) | 31 | 95 % |
| Coral Subway by wooferzfg (on 26. March 2023, 22:35) | 29 | 100 % |
| Donuts by Die Hard (on 26. October 2023, 03:30) | 33 | 100 % |
| overflow underway by aqjhs (on 9. January 2025, 05:05) | 29 | 91 % |
| the compeationist by aqjhs (on 5. June 2025, 05:28) | 34 | 96 % |
| Poison Pill Killer by JeffWajes (on 4. September 2023, 20:30) | 45 | 96 % |
