(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 | |
|---|---|---|---|
 | Slangen (ft. Dorlir) by Nordy (on 10. July 2024, 06:28) | 37 |  98 % |
| CTC Snake Sum Sudoku by Quarterthru (on 22. September 2020, 04:00) | 39 | 96 % |
| L+ by Joseph nehme (on 25. June 2021, 17:21) | 39 | 96 % |
| Consecutive Sums Sudoku by SudokuExplorer (on 21. October 2021, 22:15) | 37 | 99 % |
| All But One by Scruffamudda (on 16. August 2023, 15:20) | 81 | 95 % |
| Arrow Junkyard by PotatoHead21 (on 17. May 2024, 18:50) | 42 | 95 % |
| Close Enough by IcyFruit (on 11. April 2024, 15:54) | 119 | 97 % |
| Pulling Teeth (Nonconsecutive arrows) by Farkov (on 28. July 2021, 08:48) | 35 | 90 % |
| Entropy Minimalism by Mad-Tyas (on 10. January 2022, 13:01) | 76 | 96 % |
| Crossbar by purpl (on 12. August 2021, 07:12) | 36 | 94 % |
| Dania: Uncharted Territories by antiknight (on 7. May 2022, 19:04) | 37 | 96 % |
| GENIAL - Buchstabenrätsel / Letter Puzzle by DocLogic (on 24. May 2022, 20:49) | 31 | 98 % |
| Regional Skyscrapers Fillomino by Agent (on 25. October 2022, 09:00) | 33 | 100 % |
| Nurimisaki Sudoku - Whispers by Mark Sweep (on 9. November 2022, 16:15) | 42 | 97 % |
| Polyamorous Cages by Ennead (on 11. December 2022, 11:24) | 38 | 94 % |
| Seven High by Die Hard (on 1. September 2023, 05:54) | 40 | 92 % |
| Fillomino sudoku by Aspartagcus (on 26. March 2024, 13:39) | 113 | 95 % |
| 1001-Nacht-Rundweg by ibag (on 4. November 2013, 00:00) | 31 | 97 % |
| 10-in-9 calcudoku #1 by Nylimb (on 27. January 2020, 10:04) | 33 | 97 % |
| EUROPA - Buchstabenpyramide / letter pyramid by DocLogic (on 17. July 2020, 17:07) | 34 | 96 % |
