(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 | |
|---|---|---|---|
 | Suguru Chaos Deconstruction: Solo Little Killers by crispy16 (on 10. April 2022, 21:17) | 75 |  100 % |
| X-sums Killer Sudoku by udukos (on 4. October 2020, 04:28) | 32 | 97 % |
| Party chaos by Lizzy01 (on 27. June 2024, 21:43) | 33 | 99 % |
| Country Road Fillomino #1 (10x10) by Jesper (on 10. October 2022, 15:41) | 62 | 99 % |
| Miami Zipper by Prof.Dori (on 4. February 2024, 16:05) | 61 | 93 % |
| Killer Sudoku(002) by cdwg2000 (on 26. August 2020, 08:14) | 28 | 96 % |
| Odd Pentominoes on the Loose by JeffWajes (on 31. July 2022, 05:52) | 29 | 97 % |
| Vampire Whispers by yttrio (on 19. May 2023, 15:27) | 26 | 97 % |
| vpermb by zzw (on 25. October 2023, 05:30) | 27 | 99 % |
| blue lining white trenchcoat by aqjhs (on 19. May 2025, 00:24) | 29 | 95 % |
| Quandary by grkles (on 25. August 2021, 13:14) | 21 | 99 % |
| CC: Red by lerroyy (on 2. August 2022, 23:07) | 20 | 91 % |
| The Map by PotatoHead21 (on 21. December 2022, 07:19) | 25 | 96 % |
| Snakomino Warp Zones [Level #3] by Christounet (on 11. April 2023, 22:22) | 25 | 99 % |
| Crusties ("Indexed Fives") by RockyRoer (on 21. July 2023, 20:01) | 44 | 96 % |
| Odd-Even Encoded Skyscraper Sums by glum_hippo (on 9. April 2025, 02:14) | 22 | 94 % |
| X (Chaos Construction) by tallcat (on 11. April 2024, 07:00) | 68 | 97 % |
| 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 % |
