(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 | |
|---|---|---|---|
 | Matchaluck (A Meidjuluk N=15 Variant) by PrimeWeasel (on 11. October 2023, 11:41) | 18 |  100 % |
| House Party by DadJokes (on 6. November 2023, 20:16) | 15 | 97 % |
| Anti-Knight X arrow by psninn (on 29. October 2024, 09:19) | 63 | 91 % |
| Implications of Parity by Niverio (on 30. July 2022, 13:06) | 54 | 98 % |
| 195? 519? 951? by twototenth (on 20. September 2022, 08:00) | 55 | 97 % |
| Fourteen Arrows by FryTheGuy (on 14. September 2021, 06:47) | 41 | 95 % |
| Colossal Cave Sudoku by tesseralis (on 28. October 2022, 03:02) | 61 | 99 % |
| Intersections Sudoku by RockyRoer (on 16. July 2021, 14:00) | 20 | 93 % |
| [159] The Sum of All Indexing by W1DEMAN (on 9. November 2022, 09:59) | 21 | 97 % |
| Going in Circles by antiknight (on 1. December 2022, 15:06) | 44 | 95 % |
| Summation U-Bahn Cipher by Agent (on 3. October 2023, 09:00) | 38 | 100 % |
| Reign of Arrows (Anti-knight, Arrows) by juddimal (on 8. January 2025, 02:53) | 71 | 96 % |
| Pandora's Renban by JeffWajes (on 18. January 2023, 21:12) | 47 | 97 % |
| Too Close For Comfort by Niverio (on 3. March 2024, 16:11) | 47 | 95 % |
| Cageless (X) Killer Sudoku no. 2 by Shinya (on 23. March 2020, 12:58) | 23 | 95 % |
| Compass Sudoku by stephane.bura (on 16. July 2020, 14:54) | 24 | 97 % |
| Skyscrapers 10x10 by pandiani42 (on 6. August 2020, 12:42) | 24 | 97 % |
| XY-Differences VI, "Delimited Edition" by glum_hippo (on 4. February 2021, 20:09) | 25 | 99 % |
| Rising Arrow Sudoku - Halloween Crab by DiMono (on 3. June 2021, 18:26) | 51 | 97 % |
| Broken Square by PotatoHead21 (on 14. August 2021, 08:24) | 22 | 99 % |
