(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 | |
|---|---|---|---|
 | Wichtel 2018 (8): Zahlenweihnachtsbaum by wichtel (on 24. December 2019, 12:08) | 31 |  96 % |
| Adventssterne: Full Rank Star by Realshaggy (on 15. December 2019, 06:00) | 32 | 91 % |
| Killed Bulbs and Killer Cages - Thermo(?) Killer Sudoku by Cane_Puzzles (on 18. April 2021, 13:30) | 35 | 95 % |
| Revenge of Triad by Tyrgannus (on 18. September 2021, 06:57) | 40 | 98 % |
| Marupeke Sudoku by Crusader175 (on 7. November 2021, 08:08) | 22 | 90 % |
| Median Quads by RockyRoer (on 13. November 2021, 05:07) | 21 | 92 % |
| World of Weird Wonders - A 7x7 Irregular Sudoku Pack by Playmaker6174 (on 18. December 2021, 10:35) | 21 | 93 % |
| When-in-drome by Mojo872 (on 20. April 2022, 03:41) | 23 | 94 % |
| Overkill by Jay Dyer (on 24. August 2022, 17:19) | 91 | 98 % |
| Fillomino Romance (Chaos Construction) by Agent (on 13. December 2022, 09:00) | 55 | 99 % |
| 3 Bags Full by panthchesh (on 30. January 2023, 02:17) | 24 | 93 % |
| Corner Piece by pieguy (on 26. February 2023, 21:07) | 32 | 95 % |
| Precision (Equalines, Doubler) by Mad-Tyas (on 25. April 2023, 09:32) | 21 | 99 % |
| A View to a Kill by DadJokes (on 30. April 2024, 22:37) | 23 | 93 % |
| Bent Glass by arbitrary (on 12. May 2024, 13:00) | 46 | 94 % |
| Cada oveja con su pareja by sujoyku (on 3. July 2024, 19:46) | 21 | 94 % |
| Japanische Summen mit Pentominos by Uhu (on 19. July 2018, 22:22) | 57 | 98 % |
| Cageless (X) Killer Sudoku by Shinya (on 13. March 2020, 17:26) | 60 | 99 % |
| Drunken Knights by Blobz (on 8. July 2022, 16:00) | 49 | 93 % |
| Numbered Corridors by RockyRoer (on 7. July 2022, 13:25) | 48 | 97 % |
