(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 | |
|---|---|---|---|
 | Balanced Sudoku #02 by Nell Gwyn (on 24. September 2022, 04:50) | 11 |  100 % |
| Pastiche by zetamath (on 4. November 2022, 00:18) | 94 | 95 % |
| Farfalle by cam (on 2. December 2022, 00:25) | 49 | 95 % |
| Knights of the Round Table by BenTen (on 17. February 2023, 19:11) | 12 | 95 % |
| Battle With The Archers 39: The Lifeline of Three Worlds by Playmaker6174 (on 19. June 2023, 10:11) | 37 | 98 % |
| Aid Hope In An Arrow Quotient by PotatoHead21 (on 10. July 2023, 15:58) | 15 | 93 % |
| Dolittle's Revenge by Die Hard (on 12. October 2023, 12:19) | 12 | 90 % |
| Vacaville by glum_hippo (on 16. October 2023, 21:10) | 38 | 90 % |
| Crime of Passion by lmdemasi (on 24. December 2023, 12:13) | 38 | 93 % |
| Elements of Trilogies by Kafkapharnaum (on 29. February 2024, 05:39) | 12 | 100 % |
| The Underneath by vitaminz (on 13. March 2024, 14:01) | 16 | 93 % |
| Mod Pods (with gdc) by SamuPiano (on 26. September 2024, 15:44) | 38 | 98 % |
| In & out fillings (Flinty Collab) by palpot (on 14. January 2025, 15:00) | 22 | 94 % |
| Some Indexing by TVDK (on 24. February 2025, 02:00) | 42 | 98 % |
| U-Bahn Under Arrows by wooferzfg (on 7. April 2025, 05:57) | 24 | 98 % |
| Fist Full of Arrows by ChristianLynch (on 7. April 2025, 22:53) | 28 | 91 % |
| Octetraquadri by Nell Gwyn (on 8. April 2025, 04:03) | 13 | 90 % |
| Skyscraper Sum Sandwiches by RockyRoer (on 10. August 2025, 14:32) | 22 | 90 % |
| Another killer: no more, no less by ZeroNickel (on 21. August 2025, 20:55) | 29 | 93 % |
| Bewildered by NicoD (on 30. August 2025, 05:30) | 56 | 94 % |
