(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 | |
|---|---|---|---|
 | Wonky Numbers by ThePedallingPianist (on 28. November 2022, 23:09) | 14 |  94 % |
| Palinsums by SenatorGronk (on 25. April 2023, 18:15) | 13 | 91 % |
| Stopwatch by heliopolix (on 25. August 2023, 18:09) | 33 | 93 % |
| City of Skyscrapers by Kitty Trouble (on 5. November 2023, 14:45) | 38 | 95 % |
| Rule Out by loerting (on 3. December 2023, 23:41) | 14 | 91 % |
| 2CT Appreciation (German Whispers thermometer sudoku) by Qodec (on 1. January 2024, 23:34) | 84 | 97 % |
| Vertices by arbitrary (on 12. February 2024, 19:55) | 17 | 95 % |
| Quantum Superposition (Molecules, Whispers, Renban) by Crusader175 (on 22. July 2024, 16:00) | 12 | 91 % |
| Arrow 100 by Mad-Tyas (on 2. September 2024, 13:30) | 24 | 90 % |
| Leaning Tower by marty_sears (on 4. November 2023, 09:10) | 99 | 98 % |
| Sudoku Variants Series (302) - Y-Sums Sudoku by Richard (on 6. January 2021, 00:00) | 86 | 97 % |
| Mehrdeutige Rätsel - U-Bahn unter Hochhäusern by Zzzyxas (on 30. November 2019, 17:28) | 36 | 99 % |
| German Whispers Sandwich Sudoku by Jesper (on 4. July 2020, 11:47) | 69 | 96 % |
| Little (Killer)^2 by Lisztes (on 30. December 2020, 01:00) | 34 | 96 % |
| Qnight by tsc (on 23. October 2021, 10:13) | 37 | 97 % |
| Intertwined by siron2133 (on 29. October 2022, 11:34) | 36 | 91 % |
| Neon Neko by Senip (on 16. July 2023, 17:58) | 39 | 93 % |
| Pincers (Diagonal constraint killer sudoku) by sujoyku (on 10. September 2023, 09:32) | 92 | 95 % |
| ☾ 10-Suȵ Loop ☼ by ElChiglia (on 28. October 2023, 08:05) | 38 | 95 % |
| In a Kropki Far, Far Away by yttrio (on 12. October 2024, 01:57) | 36 | 97 % |
