(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 | |
|---|---|---|---|
 | A Special Tribute: 1K for Zeta! by Playmaker6174 (on 12. May 2022, 08:42) | 24 |  96 % |
| Garden Fences by antiknight (on 24. June 2022, 01:44) | 27 | 93 % |
| One by igniteice (on 29. November 2023, 15:48) | 26 | 93 % |
| 7 Boom (Yin Yang). by palpot (on 10. February 2024, 13:55) | 25 | 96 % |
| Convergence by dawsonjones2020 (on 13. September 2024, 16:23) | 48 | 96 % |
| Cage Growing by Visumation (on 21. October 2024, 15:44) | 67 | 97 % |
| The Good, the Bad and the Circled (fillomino) by SkepticalMario (on 6. February 2025, 14:38) | 23 | 96 % |
| 33 by arctan (on 11. February 2025, 06:21) | 24 | 96 % |
| Cherry Blossom by egubachu (on 25. March 2025, 13:37) | 45 | 99 % |
| Interference by psninn (on 7. April 2025, 14:28) | 48 | 93 % |
| Square of Squares by juggler (on 12. May 2025, 21:33) | 77 | 97 % |
| Exogenous by NicoD (on 11. September 2025, 05:30) | 25 | 97 % |
| Goldilocks by SudokuExplorer (on 25. May 2021, 01:00) | 45 | 93 % |
| Battle With The Archers 8 - The Climax: Odd Crossroad by Playmaker6174 (on 19. July 2021, 13:00) | 43 | 97 % |
| Setting the Scene by PjotrV (on 14. October 2021, 15:23) | 47 | 94 % |
| The King With The Arrow by Joseph nehme (on 22. January 2022, 08:12) | 47 | 93 % |
| Equal sum chaos by Testarossa (on 2. June 2022, 16:01) | 44 | 93 % |
| Regional Skyscrapers Fillomino by Agent (on 25. October 2022, 09:00) | 37 | 100 % |
| X-sums Chaos Construction by Lizzy01 (on 14. January 2022, 19:18) | 63 | 99 % |
| Matching by kolot (on 15. November 2021, 05:22) | 88 | 98 % |
