(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 | |
|---|---|---|---|
 | Excluded by Niverio (on 19. March 2025, 18:30) | 129 |  97 % |
| Lemures by PulverizingPancake (on 2. September 2021, 20:40) | 79 | 96 % |
| Whisper of the killer snake by Joseph nehme (on 27. August 2021, 18:07) | 34 | 95 % |
| Hashiwokakero by Myxo (on 19. September 2023, 08:25) | 30 | 96 % |
| Whispering Negativity by yttrio (on 29. June 2024, 01:10) | 33 | 93 % |
| Sudoku Boogie Woogie by juggler (on 26. November 2025, 11:37) | 38 | 91 % |
| Geburtstags-Mix Sudoku by Realshaggy (on 24. August 2020, 16:26) | 50 | 96 % |
| Build Your Own Killer: Master Designer 2 by Playmaker6174 (on 18. September 2023, 00:00) | 48 | 95 % |
| The Puzzle Has Been SET by EricRathbun (on 2. July 2025, 00:00) | 60 | 97 % |
| Synergy by Joseph nehme (on 7. August 2021, 08:11) | 76 | 95 % |
| Wichtelkalender 2014 - April by April (on 1. April 2014, 00:00) | 37 | 98 % |
| Anti King XL Thermo Killer by MavericksJD (on 24. October 2020, 20:05) | 28 | 96 % |
| Encaged 9 by Joseph nehme (on 3. January 2021, 12:20) | 66 | 99 % |
| Off with their heads! (Decapitated arrow sudoku) by Aspartagcus (on 8. September 2021, 08:38) | 18 | 98 % |
| Just do the Moth! by Nahileon (on 21. December 2021, 20:43) | 22 | 94 % |
| Tension by wooferzfg (on 19. June 2022, 08:27) | 24 | 94 % |
| The Fool's Windmill by Fool on Hill (on 15. August 2022, 18:46) | 23 | 96 % |
| 15 Decibels by JeremyDover (on 28. August 2022, 03:00) | 25 | 91 % |
| Petroglyph by DadJokes (on 7. December 2022, 19:53) | 94 | 98 % |
| Diversity 2 by Migu (on 15. February 2023, 20:08) | 52 | 90 % |
