(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 | |
|---|---|---|---|
 | Yin Yang X-sums by flutchman (on 6. September 2025, 15:35) | 41 |  95 % |
| una isla de pairrows by aqjhs (on 23. January 2026, 00:00) | 19 | 96 % |
| Veiled Minima (FOW) by antiknight (on 5. February 2026, 09:26) | 46 | 91 % |
| REDRUM by grkles (on 5. April 2021, 16:26) | 64 | 98 % |
| Tetronimo Kakuro by julius64 (on 26. April 2013, 18:12) | 47 | 93 % |
| Black and White Cookie by pieguy (on 16. September 2023, 02:41) | 63 | 94 % |
| Dutch Flat Mates (Dorminoes) by Black_Doom (on 23. July 2025, 11:30) | 56 | 95 % |
| Tenban by chrisjnap (on 14. September 2025, 17:51) | 47 | 97 % |
| 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 % |
| Chaconopia 101 by Mad-Tyas (on 2. September 2025, 15:49) | 31 | 100 % |
| RAT RUN 13: Triskaidekaphilia by marty_sears (on 6. November 2024, 02:13) | 706 | 97 % |
| 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 % |
| Would I lie to you? by juggler (on 17. December 2024, 01:37) | 76 | 96 % |
