(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 | |
|---|---|---|---|
 | The Usurper by KMD (on 15. April 2024, 02:09) | 54 |  96 % |
| Quandary by grkles (on 25. August 2021, 13:14) | 21 | 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) | 44 | 96 % |
| Poison Pill Killer by JeffWajes (on 4. September 2023, 20:30) | 46 | 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 % |
| Odd-Even Encoded Skyscraper Sums by glum_hippo (on 9. April 2025, 02:14) | 22 | 94 % |
| Parhelion by Shinya (on 2. September 2021, 00:09) | 72 | 99 % |
| Wichtel 2014 (9): Weihnachtsbaum by wichtel (on 19. March 2015, 01:24) | 38 | 99 % |
| Chicago by ICHTUES (on 29. August 2021, 06:00) | 41 | 97 % |
| 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) | 46 | 100 % |
| Japanese Sums with Marked Cells (2) by KNT (on 13. February 2025, 22:30) | 39 | 97 % |
| So Very Wrogn by tallcat (on 20. June 2023, 08:00) | 63 | 91 % |
| 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 % |
