(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 | |
|---|---|---|---|
 | Flower by zetamath (on 6. January 2021, 23:12) | 74 |  94 % |
| Renban Pünktchen Spektakel by Luigi (on 27. June 2011, 13:10) | 30 | 95 % |
| 123... Schiffe versenken by lupo (on 23. May 2015, 00:00) | 30 | 93 % |
| ZIRKUS - buntes Buchstabenrätsel / colorful letter puzzle by DocLogic (on 30. April 2020, 22:59) | 31 | 98 % |
| Snake Sum Sudoku 6 by Quarterthru (on 15. July 2020, 20:00) | 19 | 98 % |
| Double Value Killer Sudoku by Willy Wonka (on 30. August 2020, 07:18) | 40 | 97 % |
| Divisible Cage Totals #2 (oops! no totals!) by RockyRoer (on 30. October 2020, 10:56) | 33 | 96 % |
| V's by ICHTUES (on 23. May 2021, 06:00) | 18 | 93 % |
| Sandwich Fillomino #3 by Mark Sweep (on 31. December 2021, 10:00) | 17 | 96 % |
| Arrowings (version 2) by kolot (on 27. January 2022, 11:30) | 16 | 92 % |
| Cowgirl by OhHeyGuysItsMax (on 18. February 2022, 19:34) | 49 | 92 % |
| Cycle Sandwich by SirSchmoopy (on 16. May 2022, 23:08) | 20 | 93 % |
| Frankly by wooferzfg (on 20. July 2022, 17:44) | 16 | 93 % |
| Loop Knight Region by Prof.Dori (on 21. July 2023, 23:37) | 16 | 91 % |
| Line of Sight by 3good5you (on 30. July 2023, 02:35) | 18 | 93 % |
| Thermo Unicorn by NurglesGift (on 6. January 2024, 12:35) | 21 | 93 % |
| Circumlocution by LibardiA (on 12. March 2024, 17:03) | 19 | 96 % |
| Misshapen Skyscrapers by Belamis (on 19. June 2024, 21:20) | 14 | 94 % |
| Black Rose by TotallyNormalCat (on 23. July 2022, 19:00) | 100 | 95 % |
| Rose Killer Sudoku by SudokuExplorer (on 11. November 2021, 00:00) | 76 | 98 % |
