(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 | |
|---|---|---|---|
 | Four Corner Shots by noswald (on 25. May 2024, 18:28) | 47 |  95 % |
| Sum Line Sudoku #1 by Phistomefel (on 1. October 2022, 10:02) | 160 | 97 % |
| Tapa-Berührungsrundweg by usp (on 16. July 2014, 00:00) | 65 | 98 % |
| Normal Lunchbox by Undar_Beyond (on 14. May 2020, 11:26) | 66 | 95 % |
| Waben Summenkropki Invers und knapp daneben by Luigi (on 3. February 2010, 14:09) | 48 | 96 % |
| 24 Rätsel in 24 Stunden (Teil 14) - Fillomino by Zzzyxas (on 24. June 2017, 13:24) | 84 | 92 % |
| Wichtel 2019 (3): Die U-Bahn unter dem Geschenkelager by wichtel (on 9. July 2020, 20:01) | 50 | 100 % |
| Between the Little Killers by Stavros96 (on 25. August 2020, 12:08) | 50 | 93 % |
| X-Sum Arrows by Phistomefel (on 29. December 2020, 09:35) | 62 | 99 % |
| Kakuro ('Plaza') by PixelPlucker (on 17. June 2021, 05:41) | 72 | 95 % |
| Slices by Joseph nehme (on 31. July 2021, 12:43) | 46 | 96 % |
| Barnyard Mouse - purpl Collab by the_cogito (on 17. December 2021, 16:11) | 21 | 95 % |
| Parity Arrows by Jay Dyer (on 22. January 2022, 11:54) | 20 | 94 % |
| Hex 2: Regular Hexagons, Irregular Sudoku by mathpesto (on 8. June 2022, 22:53) | 23 | 94 % |
| Several Little Boxes by jsmirob (on 17. November 2022, 04:39) | 36 | 94 % |
| SC25 - Projected Sums by kuraban (on 25. November 2022, 09:32) | 21 | 95 % |
| Mods, Quads & Odds by ThePedallingPianist (on 15. October 2023, 22:19) | 95 | 98 % |
| ☾ 10-Suȵ Loop ☼ by ElChiglia (on 28. October 2023, 08:05) | 42 | 95 % |
| Heat Stroke by juggler (on 17. January 2024, 01:32) | 81 | 94 % |
| Thermal Arrows and Entropic Cages by MSDOS (on 30. May 2024, 07:23) | 66 | 95 % |
