(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 | |
|---|---|---|---|
 | The Renban Code by juggler (on 18. August 2024, 12:10) | 55 |  95 % |
| the imperial age by aqjhs (on 9. September 2024, 09:09) | 20 | 93 % |
| Yakamoz by Niverio (on 22. December 2024, 11:28) | 27 | 99 % |
| Sixteen Candles by Farkov (on 9. March 2025, 03:02) | 13 | 93 % |
| Suspicious Bilateralisms by jennyaa (on 7. November 2025, 01:02) | 12 | 91 % |
| 10+ Line Sudoku by Phistomefel (on 1. September 2022, 10:03) | 188 | 98 % |
| Cascade by zetamath (on 20. August 2023, 15:43) | 89 | 93 % |
| Mady's Moonlander by Abdul the Killer (on 20. February 2024, 12:34) | 67 | 97 % |
| have you had enough? by aqjhs (on 28. December 2025, 01:23) | 72 | 97 % |
| Neue Post aus Rätselhausen by Statistica (on 1. December 2015, 00:12) | 49 | 95 % |
| Chaos Construction: Akari by Niverio (on 25. June 2022, 21:28) | 51 | 98 % |
| Wormholes (Remix) by Nordy (on 14. May 2023, 08:00) | 54 | 97 % |
| The church of not three by filuta (on 29. August 2024, 23:56) | 51 | 98 % |
| Wingspan by Kaktuslav (on 9. March 2026, 08:00) | 159 | 97 % |
| Höhlen-U-Bahn (Teil 3) by Zzzyxas (on 18. May 2019, 11:31) | 73 | 100 % |
| Roller Coaster mit Extras 18 by Uhu (on 10. May 2020, 20:16) | 39 | 98 % |
| The French Connec7ion by Zombie Hunter (on 20. July 2021, 22:45) | 44 | 97 % |
| Middle Ground by Qodec (on 10. August 2021, 15:53) | 43 | 91 % |
| Shikasudoku by Qodec (on 8. November 2021, 18:44) | 39 | 94 % |
| X-Sum Skyscraper (hybrid) by GarlicBredFries (on 15. November 2021, 07:53) | 34 | 95 % |
