(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 | |
|---|---|---|---|
 | An artists dream by daniel66 (on 28. August 2023, 05:28) | 17 |  91 % |
| Rubik's Cube by juggler (on 22. February 2024, 02:25) | 63 | 95 % |
| Interchangeable by palpot (on 2. April 2024, 00:16) | 25 | 95 % |
| Mystery Room Somedoku by blackjackfitz (on 18. August 2024, 15:01) | 29 | 91 % |
| First Rodeo (chaos construction) by jwsinclair (on 28. September 2024, 23:49) | 65 | 97 % |
| Japanische ABCtje-Summen by ibag (on 22. September 2012, 00:08) | 54 | 99 % |
| Thermos Construction by Prof.Dori (on 15. December 2023, 02:00) | 53 | 91 % |
| Tatlins Turm (Chaos Construction) by glum_hippo (on 22. January 2024, 22:52) | 52 | 95 % |
| The Devil's Arrows by Lisztes (on 22. February 2021, 01:00) | 22 | 97 % |
| Kropki Pairs Level III by Qodec (on 20. January 2021, 00:13) | 28 | 93 % |
| Sandwiched Clues by RockyRoer (on 5. March 2021, 11:35) | 20 | 96 % |
| Regional Differences by apiyo (on 24. May 2021, 14:37) | 22 | 97 % |
| Twilight Nurikabe by KNT (on 3. January 2023, 02:12) | 41 | 99 % |
| Imploded Compass Sudoku by stephane.bura (on 11. May 2021, 20:10) | 29 | 100 % |
| Beispiel für Roller Coaster mit Extras 25 by Uhu (on 3. March 2022, 06:35) | 26 | 100 % |
| Position Sums Fillomino #2 by ONeill (on 23. October 2022, 05:47) | 29 | 99 % |
| Wichtel 2018 (7): Das historische Rätselhausen by wichtel (on 13. December 2019, 21:08) | 31 | 99 % |
| Snake-Sums Sudoku by Willy Wonka (on 18. September 2020, 17:40) | 41 | 99 % |
| Ein JaTaHoKu by Statistica (on 27. October 2011, 15:00) | 67 | 97 % |
| Kakuro Series 6: Easy as Kakuro by Puzzle_Maestro (on 16. May 2020, 16:15) | 51 | 98 % |
