(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 | |
|---|---|---|---|
 | Entroguity by twototenth (on 26. July 2022, 08:00) | 26 |  93 % |
| Enigmatic Entropic Snake by starwarigami (on 31. January 2024, 00:00) | 30 | 91 % |
| Riffle Shuffle by 99%Sneaky (on 19. April 2024, 22:52) | 26 | 95 % |
| Nurikabe Killer Sudoku by udukos (on 26. December 2020, 16:33) | 57 | 98 % |
| Primetime (Mystery Killer) by Mad-Tyas (on 11. August 2021, 00:14) | 26 | 96 % |
| Imperfect Flower (Run-on Renbans) by AnalyticalNinja (on 6. October 2022, 23:06) | 28 | 95 % |
| Secret Caverns by GarlicBredFries (on 31. October 2022, 23:25) | 28 | 92 % |
| Contained Chaos by fritzdis (on 8. December 2022, 22:26) | 30 | 97 % |
| Shady Combination #2: Country Road, Heyawake, LITS, Yin Yang by Myxo (on 24. January 2023, 16:12) | 26 | 96 % |
| Schrödinger 202: Atomic Structure by ViKingPrime (on 24. September 2023, 21:00) | 25 | 98 % |
| Build Your Own Killer: Master Designer by Playmaker6174 (on 15. August 2023, 06:00) | 56 | 94 % |
| Things in common by arbitrary (on 22. April 2024, 11:50) | 64 | 98 % |
| Whispern't Loop by yttrio (on 6. July 2024, 02:04) | 56 | 95 % |
| Schatzsuche (2001) - Rundweg knapp daneben by AI1463 (on 6. July 2014, 14:06) | 28 | 97 % |
| Position Sums mit Kropki-Paaren by glum_hippo (on 8. February 2021, 15:41) | 28 | 98 % |
| Lockout Flower by FryTheGuy (on 27. September 2021, 19:04) | 31 | 98 % |
| Build Your Own Killer: Moral Dilemmas by Playmaker6174 (on 6. May 2022, 19:02) | 28 | 99 % |
| Chaos Construction: Arrow In-10x10-sity by XeonRisq (on 21. August 2022, 04:00) | 29 | 99 % |
| Fillomino Pyramid by Myxo (on 26. February 2023, 16:04) | 29 | 97 % |
| Lines And Circles by Jeet Sampat (on 8. April 2023, 13:18) | 27 | 94 % |
