(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 | |
|---|---|---|---|
 | Interphase (Cave/Nurikabe/Pentominoes) by dumediat (on 8. January 2026, 02:57) | 38 |  94 % |
| More Drunken Knights by Blobz (on 9. September 2022, 16:00) | 113 | 96 % |
| Half the Digits (Killer) by Cane_Puzzles (on 24. May 2024, 18:06) | 190 | 97 % |
| Reachin' some region sums by twototenth (on 6. September 2022, 08:00) | 74 | 97 % |
| Mean Samurai by JayForty (on 9. January 2023, 17:11) | 86 | 96 % |
| Retraces by arbitrary (on 6. September 2024, 00:07) | 64 | 96 % |
| Focus by FlowJo (on 21. March 2022, 22:37) | 59 | 97 % |
| Narwhal by Xenonetix (on 29. June 2022, 22:22) | 57 | 98 % |
| Concordia (Sum dots, X-Sums, Kropki, German Whisper) by Bellsita (on 7. February 2025, 21:49) | 54 | 97 % |
| Kleine Hochhausserie: Finale (von allem etwas) by CHalb (on 9. December 2013, 12:03) | 44 | 97 % |
| Differenz X Chaos Sudoku by tuace (on 17. December 2016, 11:03) | 45 | 96 % |
| Six-pack Linked Sudokus #4 by Genomico (on 12. March 2021, 01:16) | 81 | 99 % |
| Consistency (Equalines Sudoku) by Mad-Tyas (on 6. November 2023, 08:46) | 50 | 94 % |
| Doubler RSL by Mad-Tyas (on 8. November 2024, 00:01) | 43 | 93 % |
| Pull-ups by Morisenseiisgod (on 5. January 2026, 13:16) | 45 | 95 % |
| Patient Zeroes by gdc (on 26. October 2025, 15:38) | 247 | 97 % |
| LUSTIG - buntes Buchstabenrätsel / colorful letter puzzle by DocLogic (on 27. January 2021, 17:43) | 35 | 95 % |
| King's Guard by Fafrd (on 6. June 2022, 03:49) | 40 | 95 % |
| Way out of my way by PrimeWeasel (on 1. September 2022, 20:36) | 40 | 92 % |
| Profusion (Yin Yang Killer) by troptot (on 14. February 2023, 19:07) | 39 | 94 % |
