(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 | |
|---|---|---|---|
 | Colours in the (k)night XVIII by Villse (on 24. November 2025, 11:02) | 117 |  91 % |
| Every Which Way But Up by HalfBakedLunatic (on 19. January 2025, 19:03) | 68 | 91 % |
| Snake Sum Sudoku 1 by Quarterthru (on 26. June 2020, 16:44) | 34 | 98 % |
| Hooligans Underground (Slingshot U-Bahn) by Piatato (on 29. May 2023, 21:21) | 30 | 99 % |
| Home Run by Jobo (on 21. May 2024, 21:10) | 27 | 91 % |
| Wichtel 2015 (11): Versunkenes Inselreich entdeckt by wichtel (on 27. June 2016, 21:05) | 31 | 95 % |
| 24 Rätsel in 24 Stunden (Teil 18) - Yajilin by Zzzyxas (on 24. June 2017, 17:24) | 74 | 93 % |
| Cherry Picking (Arrow Sudoku) by Sktx (on 25. September 2022, 17:49) | 37 | 94 % |
| Oops! All Regions by ChinStrap (on 12. November 2025, 18:30) | 70 | 95 % |
| Pentominous Killer Kakuro by Agent (on 10. February 2024, 09:00) | 112 | 99 % |
| Rundweg auf dem Würfel by flooser (on 3. September 2009, 12:18) | 79 | 96 % |
| Inner Skyscrapers by tesseralis (on 30. September 2022, 23:08) | 74 | 98 % |
| Dancing Arrows (Arrow Sudoku) by FryTheGuy (on 15. June 2021, 07:42) | 45 | 93 % |
| Schirmflechte Krypt by Luigi (on 25. August 2009, 11:14) | 31 | 90 % |
| Quintupelblock by ibag (on 17. June 2015, 22:47) | 53 | 97 % |
| Loses Kalenderblatt April 2016 by April (on 1. April 2016, 00:00) | 32 | 98 % |
| Kropki squared sudoku #1 by Nylimb (on 20. September 2020, 07:45) | 14 | 94 % |
| Renban Dance by Qodec (on 20. May 2021, 18:27) | 46 | 97 % |
| Turn up the Heat by GBPack (on 20. July 2021, 02:50) | 27 | 95 % |
| Unusual journey of a lonely knight (chaos construction) by filuta (on 16. August 2021, 01:09) | 31 | 97 % |
