(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 | |
|---|---|---|---|
 | Daffodil by jovi_al (on 15. April 2021, 22:57) | 65 |  95 % |
| Bethermoween Sudoku by Cane_Puzzles (on 30. April 2021, 18:00) | 18 | 91 % |
| Even Hunter by Lisztes (on 16. October 2021, 01:00) | 20 | 91 % |
| Kropki Pairs Fillomino by Mark Sweep (on 23. November 2022, 10:00) | 35 | 93 % |
| Merry Camel to you! by panthchesh (on 19. December 2022, 19:30) | 22 | 91 % |
| Mountain sandwich sudoku by Nylimb (on 12. February 2023, 23:01) | 15 | 96 % |
| Should I Goodliffe The Thermo? by GBPack (on 4. April 2023, 01:18) | 18 | 95 % |
| In the Proximity by Lizzy01 (on 12. May 2023, 21:35) | 39 | 95 % |
| Hybrid Star Battle Series (020) - Shivers by BenceJoful (on 28. May 2023, 01:02) | 20 | 95 % |
| Shivirrwisches (Shivers/Irrwisch) by dumediat (on 14. August 2023, 13:50) | 15 | 100 % |
| Parity Poopers by aleph-0 (on 29. February 2024, 12:59) | 16 | 98 % |
| Alphabet X-Sums by Scruffamudda (on 9. July 2024, 11:28) | 15 | 92 % |
| Wichtelkalender 2012 (12) und Schluss by wichtel (on 1. December 2012, 09:00) | 60 | 95 % |
| Between the Little Killers by Stavros96 (on 25. August 2020, 12:08) | 49 | 93 % |
| Four Leaf... by Bremster (on 3. January 2022, 23:13) | 49 | 95 % |
| Quadruple Knights Out of Order by GBPack (on 23. July 2023, 17:20) | 112 | 94 % |
| Antithesis (Yin Yang Killer Sudoku) by Agent (on 23. August 2022, 09:00) | 170 | 99 % |
| 真笑Puzzles038--Chaos Construction-- “韩非子” 003 by cdwg2000 (on 6. April 2021, 14:18) | 29 | 98 % |
| Kakuro — 'Plaza' by PixelPlucker (on 17. June 2021, 05:41) | 68 | 95 % |
| Table for Four - Battleship by uvo (on 19. August 2014, 12:27) | 41 | 97 % |
