(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 | |
|---|---|---|---|
 | Sudon'tku by IsaacR (on 19. November 2021, 06:52) | 32 |  91 % |
| Party chaos by Lizzy01 (on 27. June 2024, 21:43) | 33 | 99 % |
| Chaos Construction: Minesweeper by Phistomefel (on 29. March 2021, 13:28) | 97 | 98 % |
| Country Road Fillomino #1 (10x10) by Jesper (on 10. October 2022, 15:41) | 63 | 99 % |
| Crypto Japanese Slitherlink by KNT (on 12. November 2022, 22:43) | 59 | 98 % |
| Miami Zipper by Prof.Dori (on 4. February 2024, 16:05) | 62 | 93 % |
| Japanische Summen-Koralle Knapp Daneben by Uhu (on 16. January 2017, 21:18) | 49 | 98 % |
| Killer Sudoku(002) by cdwg2000 (on 26. August 2020, 08:14) | 29 | 96 % |
| Kill o' the Whisp by starwarigami (on 1. June 2022, 20:10) | 27 | 90 % |
| Wichtel 2021 (5): Fehlkommunikation by wichtel (on 12. August 2022, 20:21) | 25 | 99 % |
| a night in the city by aqjhs (on 27. October 2025, 00:49) | 27 | 95 % |
| The Usurper by KMD (on 15. April 2024, 02:09) | 55 | 96 % |
| Quandary by grkles (on 25. August 2021, 13:14) | 22 | 99 % |
| CC: Red by lerroyy (on 2. August 2022, 23:07) | 20 | 91 % |
| Fillomino: Cryptic Differences #2 by Niverio (on 1. October 2022, 17:49) | 45 | 97 % |
| The Map by PotatoHead21 (on 21. December 2022, 07:19) | 25 | 96 % |
| Crusties ("Indexed Fives") by RockyRoer (on 21. July 2023, 20:01) | 45 | 96 % |
| Poison Pill Killer by JeffWajes (on 4. September 2023, 20:30) | 47 | 96 % |
| The Colour out of Space (Advanced Black Hole) by heliopolix (on 31. March 2024, 22:23) | 21 | 93 % |
| Aqropolis [Aqre Loop Japanese Sums Deconstruction] by Christounet (on 14. May 2024, 00:43) | 23 | 99 % |
