(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 | |
|---|---|---|---|
 | Hedge Maze by dennischen (on 20. May 2024, 10:10) | 32 |  91 % |
| Lots of Fun by heliopolix (on 29. May 2024, 20:49) | 31 | 95 % |
| Two Strings by zegres (on 21. July 2022, 04:38) | 122 | 98 % |
| Kakuro — 'Plaza' by PixelPlucker (on 17. June 2021, 05:41) | 69 | 95 % |
| March of the Spiders by Niverio (on 20. October 2021, 11:58) | 76 | 94 % |
| Kerzen 4 by usp (on 26. January 2015, 00:00) | 47 | 94 % |
| A puzzle of two halves by arbitrary (on 13. April 2024, 11:32) | 85 | 98 % |
| Somedokus Are Friendly Dokus by juggler (on 15. April 2024, 20:39) | 42 | 96 % |
| Undec-ided by SirSchmoopy (on 11. April 2022, 00:06) | 72 | 98 % |
| Candy Craze by Niverio (on 5. August 2023, 11:58) | 77 | 96 % |
| The Train and the Fly by marty_sears (on 16. August 2024, 11:13) | 83 | 95 % |
| Knapp-daneben-Kryptos (6): Japanische Summen by ibag (on 2. February 2014, 21:29) | 56 | 98 % |
| Half The Killer I Used To Be by Djmelee3000 (on 1. September 2020, 00:17) | 32 | 94 % |
| Hybridsudoku, „Der kleine Trommler“ by glum_hippo (on 22. December 2020, 20:54) | 47 | 94 % |
| SPION-AGENT-KUNDSCHAFTER Buchstabenrätsel by DocLogic (on 16. March 2021, 14:14) | 37 | 98 % |
| Quad sums sudoku by udukos (on 17. August 2021, 18:07) | 49 | 96 % |
| Four Leaf... by Bremster (on 3. January 2022, 23:13) | 50 | 96 % |
| Equal Color Sums by rmahus (on 6. January 2022, 08:00) | 20 | 92 % |
| Tilting by SSG (on 2. June 2022, 07:03) | 45 | 100 % |
| Hex 2: Regular Hexagons, Irregular Sudoku by mathpesto (on 8. June 2022, 22:53) | 21 | 94 % |
