(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 | |
|---|---|---|---|
 | Interlocked by Niverio (on 9. May 2022, 22:43) | 69 |  96 % |
| Ambiguous Identical Little Killers by Jeet Sampat (on 13. October 2022, 21:32) | 21 | 96 % |
| Psycho Dominoes by Allagem (on 9. January 2023, 00:53) | 21 | 94 % |
| Cross-Stitch Monster by virtual (on 27. July 2023, 03:07) | 20 | 99 % |
| Extenban YYSL by Blobz (on 25. December 2023, 16:00) | 72 | 98 % |
| Diarrowgonal by LeaVulpina (on 17. January 2024, 16:19) | 43 | 95 % |
| Thermal Counting Quads by MSDOS (on 28. June 2024, 02:51) | 28 | 93 % |
| Mutagen by jsmirob (on 5. February 2025, 00:01) | 22 | 92 % |
| ON EDGE: Brown & Green by marty_sears (on 9. February 2025, 11:08) | 113 | 96 % |
| Heated Entropic Loop by yttrio (on 23. February 2024, 20:12) | 56 | 96 % |
| Kurotto (Aqre) by KNT (on 3. June 2024, 15:44) | 95 | 98 % |
| Wichtel 2017 (6): Easy as Kakuro by wichtel (on 22. June 2018, 10:04) | 56 | 97 % |
| 3etween 2 (Between lines sudoku) by Qodec (on 5. November 2022, 11:32) | 58 | 96 % |
| XY-Differences Fillomino by glum_hippo (on 21. August 2023, 01:39) | 57 | 97 % |
| Thermal Arrows and Entropic Cages by MSDOS (on 30. May 2024, 07:23) | 61 | 96 % |
| Would I lie to you? by juggler (on 17. December 2024, 01:37) | 55 | 96 % |
| Radar by Jobo (on 10. August 2023, 09:48) | 79 | 93 % |
| Mods, Quads & Odds by ThePedallingPianist (on 15. October 2023, 22:19) | 75 | 98 % |
| Hitchcocks Krypto ABCtje by tuace (on 29. September 2014, 11:55) | 31 | 95 % |
| Consecutive Manhattan Sudoku by Madmahogany (on 27. June 2020, 00:26) | 50 | 93 % |
