(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 | |
|---|---|---|---|
 | Mind the Gap by juggler (on 6. July 2024, 06:05) | 50 |  96 % |
| The Devil's Arrows by Lisztes (on 22. February 2021, 01:00) | 21 | 97 % |
| Sandwiched Clues by RockyRoer (on 5. March 2021, 11:35) | 20 | 96 % |
| Regional Differences by apiyo (on 24. May 2021, 14:37) | 21 | 97 % |
| Thermo's Adea by PotatoHead21 (on 30. April 2022, 23:07) | 21 | 93 % |
| Twilight Nurikabe by KNT (on 3. January 2023, 02:12) | 41 | 99 % |
| Angel Fish by Blobz (on 29. July 2024, 16:00) | 25 | 91 % |
| Urban Sprawl by jwsinclair (on 27. July 2022, 18:56) | 26 | 97 % |
| Position Sums Fillomino #2 by ONeill (on 23. October 2022, 05:47) | 29 | 99 % |
| Roller Coaster Cipher by ONeill (on 16. June 2024, 16:26) | 28 | 100 % |
| Ein JaTaHoKu by Statistica (on 27. October 2011, 15:00) | 65 | 97 % |
| 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 % |
| Roller Coaster mit Extras 2 by Uhu (on 5. January 2018, 21:48) | 63 | 100 % |
| Mönch (Killer sudoku) by Qodec (on 13. December 2023, 21:51) | 66 | 96 % |
| Kakuro Series 6: Easy as Kakuro by Puzzle_Maestro (on 16. May 2020, 16:15) | 50 | 98 % |
| Anti-Knight Arrow Sudoku by MeloMania! (on 29. October 2020, 16:23) | 18 | 96 % |
| CHRISTBAUM - Buchstabenrätsel / Letter Puzzle by DocLogic (on 20. December 2021, 19:00) | 29 | 94 % |
| Killer Numbered Rooms by the_cogito (on 21. March 2023, 21:04) | 35 | 94 % |
| Thin Gloss by mnasti2 (on 30. May 2023, 20:50) | 25 | 93 % |
