(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 | |
|---|---|---|---|
 | Black or White Coral by KNT (on 27. May 2024, 03:47) | 50 |  98 % |
| March of the Spiders by Niverio (on 20. October 2021, 11:58) | 78 | 95 % |
| Double-Digit-Thermo III "The Ant nest" by Garford (on 10. February 2021, 17:55) | 35 | 99 % |
| Hybrid Star Battle Series (001) - Tapa-like Loop by BenceJoful (on 8. January 2023, 07:42) | 31 | 91 % |
| A Very Full Quiver by Oddlyeven (on 14. April 2023, 22:39) | 30 | 94 % |
| ▜▖Renbanimo Loop▗▛ by ElChiglia (on 30. December 2023, 07:15) | 32 | 96 % |
| Synergies by Playmaker6174 (on 1. December 2024, 04:00) | 66 | 95 % |
| Up To N-igma (with Matt Tressel) by ChinStrap (on 5. June 2025, 15:56) | 28 | 96 % |
| Prismatic Palindromes by Scojo (on 19. November 2024, 01:10) | 119 | 97 % |
| SAT Sudoku (Quads and Anti-Quads) by RockyRoer (on 27. August 2021, 13:00) | 81 | 97 % |
| Wichtel 2011 (10): Japanische Summen - knapp daneben by wichtel (on 7. March 2012, 10:00) | 81 | 97 % |
| Table for Four - Battleship by uvo (on 19. August 2014, 12:27) | 42 | 97 % |
| Kerzen 4 by usp (on 26. January 2015, 00:00) | 48 | 94 % |
| Chroma-Some (Killer) by zegres (on 5. March 2024, 05:31) | 49 | 91 % |
| A puzzle of two halves by arbitrary (on 13. April 2024, 11:32) | 89 | 98 % |
| Secret Crossing by Groktilian (on 18. November 2024, 07:00) | 48 | 93 % |
| Dimensional Analysis by Fenners (on 2. May 2025, 19:16) | 93 | 97 % |
| Wichtel 2017 (6): Easy as Kakuro by wichtel (on 22. June 2018, 10:04) | 58 | 97 % |
| Sum Sets by Scruffamudda (on 28. April 2023, 11:09) | 63 | 97 % |
| LITSomino by mathpesto (on 23. March 2024, 15:48) | 66 | 94 % |
