(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 | |
|---|---|---|---|
 | Triple Tapa by Nell Gwyn (on 28. November 2025, 21:47) | 25 |  94 % |
| Liar Sudoku - Everything Is Wrogn by DiMono (on 18. September 2020, 19:23) | 98 | 99 % |
| Battle With The Archers 3: The Suspicious Butterfly by Playmaker6174 (on 14. June 2021, 13:06) | 68 | 96 % |
| Only One Possible Solution Exists by Md88keys (on 4. September 2025, 04:51) | 85 | 94 % |
| Cage Scraper by glum_hippo (on 24. January 2021, 06:00) | 50 | 97 % |
| Double-Digit-Thermo I "The Tree" by Garford (on 23. January 2021, 19:04) | 55 | 96 % |
| In the Zoo by Qodec (on 21. February 2021, 19:50) | 51 | 90 % |
| Slangen (ft. Dorlir) by Nordy (on 10. July 2024, 06:28) | 42 | 99 % |
| Thorny issues [German Whisper Deconstruction] by Christounet (on 17. February 2023, 23:36) | 90 | 97 % |
| Duplicates Somedoku by blackjackfitz (on 2. March 2024, 20:42) | 147 | 98 % |
| Factor Attractor (Ratio Sudoku) by Volatility (on 28. July 2020, 03:10) | 46 | 96 % |
| Broken Ring by Lizzy01 (on 10. January 2021, 20:15) | 28 | 91 % |
| Parity Party XIV, "Avec cages" by glum_hippo (on 4. January 2021, 13:13) | 21 | 94 % |
| Pentominominous by emmettcito (on 22. May 2021, 18:51) | 21 | 99 % |
| Bent arrows by JoWovrin (on 19. June 2021, 13:20) | 44 | 96 % |
| SunSET Over The Pyramid by zegres (on 20. December 2021, 23:12) | 40 | 96 % |
| A Special Tribute: 1K for Zeta! by Playmaker6174 (on 12. May 2022, 08:42) | 24 | 96 % |
| Garden Fences by antiknight (on 24. June 2022, 01:44) | 27 | 93 % |
| Yin-Yang Thermos by Prof.Dori (on 10. October 2023, 17:23) | 46 | 94 % |
| One by igniteice (on 29. November 2023, 15:48) | 25 | 93 % |
