(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 | |
|---|---|---|---|
 | Fish food by Qodec (on 4. December 2020, 23:21) | 48 |  97 % |
| Odd/Even Consecutive Killer 4 by Quarterthru (on 9. January 2021, 12:00) | 24 | 95 % |
| Súmmetros by Lisztes (on 1. October 2021, 01:00) | 46 | 97 % |
| Kings and/or Knights by Scruffamudda (on 5. August 2022, 03:08) | 46 | 92 % |
| Tuning Forks #3 by Blashyrkh (on 28. March 2023, 12:09) | 24 | 93 % |
| Thermo Unicorn by NurglesGift (on 6. January 2024, 12:35) | 26 | 92 % |
| Molopo (XY-Differences Sudoku) by Qodec (on 29. March 2024, 15:34) | 70 | 94 % |
| Skropki Dots 17 by Christounet (on 24. December 2024, 09:46) | 21 | 99 % |
| Boundaries by Playmaker6174 (on 16. November 2024, 02:00) | 78 | 95 % |
| Infancy by Myxo (on 14. November 2022, 14:27) | 110 | 97 % |
| Five Fish by SXH (on 28. November 2024, 02:57) | 122 | 96 % |
| Waben Summenhochhauskropki Triple Invers und knapp daneben by Luigi (on 15. February 2010, 12:31) | 31 | 93 % |
| Loses Kalenderblatt April 2015 by April (on 1. April 2015, 00:00) | 28 | 98 % |
| Earthquake in Sudokutown #2 by PrimeWeasel (on 14. January 2021, 17:39) | 28 | 99 % |
| 6x6 Chaos Construction: Boundary N-Sums (墨子) by SudokuExplorer (on 27. April 2021, 01:00) | 28 | 94 % |
| There's Something Off in This Sandwich by RockyRoer (on 8. April 2023, 21:08) | 34 | 99 % |
| Mods & Quads by marty_sears (on 14. October 2023, 00:11) | 59 | 93 % |
| Taron [Fog of War] by IcyFruit (on 23. May 2024, 13:16) | 144 | 97 % |
| Dominobrücken (Teil 3) by Zzzyxas (on 26. October 2015, 19:55) | 38 | 94 % |
| ZAUBERN - MAGIE - Buchstabenrätsel by DocLogic (on 13. February 2020, 22:25) | 37 | 90 % |
