(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 | |
|---|---|---|---|
 | Wichtel 2019 (9): Hybrid by wichtel (on 4. October 2020, 19:02) | 36 |  99 % |
| Areal Sudoku by ICHTUES (on 4. February 2021, 12:26) | 76 | 95 % |
| Seilkunde by Blashyrkh (on 16. May 2024, 17:40) | 39 | 96 % |
| Mystery Cages Somedoku by blackjackfitz (on 18. September 2024, 01:13) | 37 | 90 % |
| Mousetrap? (A Rat Run Homage) by tallcat (on 16. January 2025, 06:00) | 222 | 98 % |
| Halligen by KNT (on 8. January 2023, 07:48) | 43 | 99 % |
| Misdirection by MicroStudy (on 24. May 2023, 15:31) | 43 | 95 % |
| Philly by zetamath (on 8. July 2024, 01:14) | 48 | 94 % |
| Six-pack Linked Sudokus #2 by Genomico (on 4. October 2020, 16:49) | 57 | 98 % |
| Quiet, please! (renban whispers sudoku) A.k.a. "The Pipe" by Lizzy01 (on 18. August 2022, 20:51) | 52 | 98 % |
| Honk! by Nahileon (on 12. February 2023, 22:14) | 61 | 95 % |
| Cover Up (Tapa Sudoku) by tallcat (on 3. April 2025, 06:00) | 76 | 95 % |
| Wichtel 2014 (14 und Schluss): Durch den Zauberwald by wichtel (on 17. April 2015, 01:42) | 33 | 98 % |
| Geburtstagsgruß by ibag (on 20. April 2019, 00:00) | 25 | 90 % |
| Parity Party V — "Vortex Temporum" by glum_hippo (on 19. April 2020, 06:21) | 35 | 92 % |
| Killer Battlefield Sudoku : Enigma by Carrick22 (on 29. May 2020, 12:14) | 37 | 96 % |
| Wärmetod by glum_hippo (on 3. September 2020, 17:55) | 17 | 93 % |
| Crossguard Lightsaber Sudoku by Stavros96 (on 29. October 2020, 13:01) | 27 | 94 % |
| Fünfter Pfeilchenstrauß, "Quer Beet" by glum_hippo (on 8. December 2020, 16:37) | 28 | 95 % |
| Shy Magic Square Sudoku by ICHTUES (on 21. February 2021, 06:00) | 21 | 93 % |
