(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 | |
|---|---|---|---|
 | Connon by PrimeWeasel (on 4. July 2021, 11:06) | 28 |  93 % |
| 45+45=90 by the_cogito (on 18. October 2021, 15:23) | 12 | 98 % |
| A Horse with No Name (Broken 159) by purpl (on 2. January 2022, 18:01) | 45 | 97 % |
| Knuckle Sandwich by PrimeWeasel (on 31. January 2022, 10:07) | 13 | 92 % |
| Renbanage by Celery (on 14. November 2022, 00:58) | 31 | 94 % |
| Square Dancing by EricRathbun (on 1. October 2024, 10:16) | 31 | 92 % |
| Kropki-Masyudoku by Lizzy01 (on 21. January 2024, 18:43) | 20 | 94 % |
| The Way You Look Tonight by juggler (on 5. June 2024, 06:52) | 66 | 95 % |
| Four-Ring Circus by Nebuzaradan (on 19. September 2025, 18:36) | 14 | 96 % |
| $10 Modular Housing by mellowrobinson (on 3. December 2025, 16:38) | 32 | 95 % |
| XV*3.2 by NurglesGift (on 26. July 2024, 10:05) | 204 | 97 % |
| Extremities by Joseph nehme (on 10. July 2024, 08:06) | 106 | 95 % |
| Wichtel 2011 (11): Ein 3D Japasumino by wichtel (on 14. March 2012, 09:00) | 64 | 92 % |
| It's Gonna Be a Long Knight by cam (on 16. February 2021, 07:04) | 52 | 98 % |
| Eight Squares by jovi_al (on 26. September 2021, 23:34) | 120 | 97 % |
| Grid Your Lions by cristophermoore (on 16. September 2023, 23:53) | 60 | 92 % |
| Extenban YYSL by Blobz (on 25. December 2023, 16:00) | 122 | 98 % |
| One-Man Band (H+C Region Sum) by brennan77 (on 22. February 2023, 03:39) | 39 | 98 % |
| Twin Killer Sudoku VI by Richard (on 29. August 2014, 12:00) | 82 | 95 % |
| Bálint Kopasz (Tokyo 2020) by Lisztes (on 5. August 2021, 00:46) | 26 | 91 % |
