(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 | |
|---|---|---|---|
 | Average Sudoku 3 by Lyun Licuss (on 19. September 2022, 10:08) | 19 |  98 % |
| Arrowslits by antiknight (on 19. September 2022, 18:50) | 38 | 94 % |
| Hooked (Run-on Renbans/X-sums) by dumediat (on 23. September 2022, 20:38) | 17 | 94 % |
| Pennington by wooferzfg (on 6. October 2022, 05:42) | 43 | 94 % |
| Mongoose by Pallando (on 7. October 2022, 02:25) | 18 | 100 % |
| Sasayaki Misaki (Whispering Cape) - Nurimisaki/German Whispers Sudoku by rockratzero (on 10. October 2022, 18:09) | 15 | 96 % |
| Bird of Paradise (Segmented Region Sum Lines) by AnalyticalNinja (on 18. October 2022, 01:11) | 15 | 98 % |
| Nameless Edge(8x8 Self-Hinting Sudoku) by AstralSky (on 15. November 2022, 11:31) | 12 | 93 % |
| Splash by Joseph nehme (on 17. November 2022, 10:18) | 64 | 94 % |
| Route 75 by mathpesto (on 18. November 2022, 22:16) | 38 | 98 % |
| ModBan Knights by jcgodart (on 27. November 2022, 05:36) | 25 | 91 % |
| Four Five Six by Joseph nehme (on 2. December 2022, 07:58) | 57 | 94 % |
| Sudoku Found in a Viking Grave by Thorsby (on 4. December 2022, 02:19) | 17 | 100 % |
| Xs and Os [Parity, Whispers, Palindromes] by Malrog (on 5. December 2022, 01:42) | 53 | 98 % |
| SC26 - Renban 3 by kuraban (on 8. December 2022, 04:30) | 38 | 98 % |
| Killer Battle by 10feet (on 8. December 2022, 05:08) | 19 | 96 % |
| Entroban by jcgodart (on 11. December 2022, 04:56) | 55 | 95 % |
| What's Literally Eating Gilbert Grape by Thorsby (on 11. December 2022, 08:06) | 47 | 97 % |
| Twirl by SudokuExplorer (on 3. January 2023, 14:00) | 49 | 96 % |
| Ambiguous Palindrome by Maxentius (on 21. January 2023, 22:23) | 16 | 94 % |
