(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 | |
|---|---|---|---|
 | Medieval by UnnamedSorcerer (on 5. August 2021, 03:17) | 15 |  93 % |
| Sudoku Variants Series (351) - Double Trouble Killer Sudoku by Richard (on 15. December 2021, 00:00) | 69 | 96 % |
| Knuckle Sandwich by PrimeWeasel (on 31. January 2022, 10:07) | 12 | 91 % |
| American Whispers - purpl Collab by the_cogito (on 20. February 2022, 14:37) | 12 | 95 % |
| _234_678_ by twototenth (on 22. February 2022, 08:00) | 44 | 92 % |
| Kropki'd calcudoku #2 by Nylimb (on 30. June 2022, 00:35) | 14 | 98 % |
| Whisper Dots by XeonRisq (on 24. September 2022, 20:00) | 12 | 93 % |
| Three is a Crowd Sudoku #2 by Genomico (on 27. September 2022, 20:55) | 13 | 100 % |
| All 14 by Mad-Tyas (on 19. October 2022, 11:39) | 53 | 95 % |
| Variations by Nebuzaradan (on 22. June 2023, 16:05) | 14 | 93 % |
| Cage Dive by Peter the Dog (on 11. December 2023, 22:41) | 13 | 95 % |
| Kropki-Masyudoku by Lizzy01 (on 21. January 2024, 18:43) | 19 | 93 % |
| Two Sums by CaptZebraCakes (on 26. January 2024, 20:57) | 40 | 96 % |
| Zippular Region Sums by gdc (on 27. March 2024, 19:00) | 26 | 96 % |
| Production Lines by Mr Toffee (on 5. June 2024, 17:35) | 15 | 95 % |
| Tirol Choco (Chocona Hybrid) by sfushidahardy (on 20. September 2024, 02:20) | 15 | 100 % |
| Doubler RSL by Mad-Tyas (on 8. November 2024, 00:01) | 38 | 92 % |
| el quinto sol by aqjhs (on 27. November 2024, 05:00) | 15 | 93 % |
| Straddle by marty_sears (on 26. December 2023, 22:35) | 70 | 97 % |
| Entropic Paradox by XeonRisq (on 1. February 2023, 15:00) | 42 | 94 % |
