(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 | |
|---|---|---|---|
 | The Box by FryTheGuy (on 2. November 2021, 02:22) | 24 |  92 % |
| Hopscotch (Remix) by Nordy (on 3. September 2022, 08:00) | 47 | 95 % |
| Puzzle Plaza (relative clones + cipher sudoku) by Aspartagcus (on 16. October 2022, 11:41) | 30 | 95 % |
| Mayfair (Anti-King Region Sum Lines) by Xendari (on 8. November 2022, 08:22) | 27 | 97 % |
| Peaucellier-Lipkin by Palfly Kampling (on 22. July 2023, 05:20) | 26 | 97 % |
| Manifold by Oddlyeven (on 28. April 2024, 15:43) | 51 | 97 % |
| Taron [Fog of War] by IcyFruit (on 23. May 2024, 13:16) | 168 | 97 % |
| X---V*6 by NurglesGift (on 19. May 2025, 18:38) | 98 | 96 % |
| Hungry Rabbit in the Fog by MCMCHammer (on 18. July 2025, 13:18) | 110 | 97 % |
| Doppel Peas in a Pod by ralphwaldo1 (on 7. November 2025, 01:27) | 26 | 93 % |
| Shanghai Skyline by Black_Doom (on 13. April 2025, 12:27) | 108 | 97 % |
| Black and White by zetamath (on 12. February 2021, 23:34) | 84 | 98 % |
| 14 Givens by lepton (on 4. February 2024, 04:34) | 105 | 96 % |
| Puzzle by usp (on 10. April 2015, 00:00) | 39 | 98 % |
| Rose Killer Sudoku by SudokuExplorer (on 11. November 2021, 00:00) | 78 | 98 % |
| Snake in the City by Lizzy01 (on 28. November 2021, 14:24) | 41 | 95 % |
| Region Sum Lines Sudoku by Qodec (on 14. January 2022, 20:20) | 128 | 97 % |
| Hidden X-Sums by RockyRoer (on 8. August 2022, 17:48) | 38 | 99 % |
| Under the Microscope (Infections, Cave) by gdc (on 1. November 2025, 16:05) | 169 | 98 % |
| Consecutiveness by Niverio (on 1. August 2021, 11:47) | 55 | 95 % |
