(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 | |
|---|---|---|---|
 | Orange & Blue by FJL (on 4. December 2022, 15:45) | 26 |  92 % |
| Check the corners by Stoer (on 18. April 2023, 15:13) | 33 | 90 % |
| Chaos Karussell VI by Luigi (on 16. September 2011, 10:15) | 49 | 94 % |
| Colored Groups by Nahileon (on 8. October 2025, 15:50) | 98 | 96 % |
| Gerade Ungerade Koralle by tuace (on 3. November 2013, 18:30) | 64 | 93 % |
| The Mine by FKlauser (on 18. April 2021, 20:30) | 26 | 91 % |
| pionOeno (Chaos Construction, 6x6) by thoughtbyte (on 5. October 2022, 21:56) | 25 | 90 % |
| Rope Skipping by Mad-Tyas (on 6. December 2022, 05:32) | 22 | 91 % |
| Mini Suguru Pentominoes by Chefofdeath (on 19. March 2024, 01:59) | 27 | 92 % |
| Dotted around [Kropki Deconstruction] by Christounet (on 10. February 2023, 22:41) | 117 | 97 % |
| Sort Circuit by IcyFruit (on 13. November 2023, 22:49) | 49 | 93 % |
| Straddle by marty_sears (on 26. December 2023, 22:35) | 92 | 96 % |
| Beauty Mark by zetamath (on 24. August 2023, 21:36) | 159 | 95 % |
| Cageless (X) Killer Sudoku no. 3 by Shinya (on 3. April 2020, 22:10) | 23 | 96 % |
| Phantom Killer 9x9 by Mondestrunken (on 10. May 2020, 18:37) | 20 | 97 % |
| Happy Holidays #3: Wassailing by Big Tiger (on 9. December 2020, 00:00) | 23 | 100 % |
| Hot Coffee [Thermo Killer Sudoku] by ogi.djukovic (on 20. February 2021, 08:00) | 23 | 91 % |
| 真笑Puzzles036--Chaos Construction-- “韩非子” 002 by cdwg2000 (on 27. March 2021, 09:27) | 20 | 93 % |
| Totem Art by tenaliraman (on 14. April 2021, 15:32) | 20 | 94 % |
| Set Aside the Obvious by JoWovrin (on 26. June 2021, 16:33) | 20 | 94 % |
