(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 | |
|---|---|---|---|
 | 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) | 115 | 97 % |
| Entanglement by Jay Dyer (on 25. July 2024, 16:15) | 255 | 97 % |
| 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) | 22 | 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 % |
| 真笑Puzzles041--Wall Sudoku by cdwg2000 (on 29. January 2022, 13:40) | 21 | 97 % |
| Friendlynori by Calesch (on 16. July 2024, 01:02) | 19 | 96 % |
| ShatteredSudoku by DubiousMobius (on 1. August 2024, 18:32) | 22 | 91 % |
| Crescent Archery by Xendari (on 14. November 2022, 08:57) | 43 | 93 % |
| Renban Fillomino by MagnusJosefsson (on 26. March 2022, 14:01) | 83 | 98 % |
| Encrypted Sandwich by cfop (on 31. January 2021, 21:18) | 19 | 95 % |
| Bleu Blanc Dot by PetLov (on 27. March 2021, 12:44) | 19 | 93 % |
| Carnivorous Pansy by PjotrV (on 10. April 2021, 09:22) | 20 | 95 % |
