(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 | |
|---|---|---|---|
 | Liar Japanese Sums #6 - Ciphered Tapa by Niverio (on 10. September 2023, 20:47) | 47 |  99 % |
| The Ankheg (Zippular Lines #4) by heliopolix (on 30. December 2023, 16:36) | 17 | 94 % |
| [TSL][S1T2] At the Edge of the Future (Variant Foreshadow) by The Book Wyrm (on 14. January 2025, 02:33) | 15 | 98 % |
| Railroaded by someguy209 (on 31. January 2025, 23:33) | 14 | 94 % |
| Keep Talking [And No One Explodes] by zetamath (on 27. December 2021, 20:54) | 98 | 97 % |
| Matroschka, grosse Version by pirx (on 5. February 2016, 18:00) | 45 | 97 % |
| Pentomilin by Myxo (on 16. March 2025, 17:50) | 51 | 99 % |
| Sudokutown is That Way by Aaronomys (on 20. February 2022, 14:26) | 32 | 99 % |
| Checkered Slitherlink by KNT (on 18. June 2024, 03:12) | 37 | 100 % |
| Yajilominous by Nell Gwyn (on 16. March 2025, 18:25) | 34 | 98 % |
| Ten Knights by FryTheGuy (on 20. August 2021, 08:16) | 131 | 97 % |
| Wichtel 2018 (2): Schnorchelreise by wichtel (on 6. June 2019, 10:28) | 35 | 99 % |
| Die Kryptos - S04E03: Roller Coaster by tuace (on 21. January 2020, 08:06) | 55 | 99 % |
| . o T o . by Lisztes (on 30. June 2021, 01:00) | 20 | 92 % |
| Hey, Are You Awake? by mathpesto (on 7. August 2022, 22:06) | 37 | 98 % |
| Wichtel 2021 (7): In der Weihnachtsbäckerei by wichtel (on 4. October 2022, 21:02) | 17 | 100 % |
| Benefactors by Andrewsarchus (on 10. September 2022, 07:31) | 18 | 98 % |
| Yin Yang Yung by Big Tiger (on 5. December 2022, 23:52) | 17 | 98 % |
| Prison Party of Eight by lepton (on 10. January 2023, 18:59) | 19 | 94 % |
| Tachyons and Black Holes (Black Hole) by heliopolix (on 16. January 2023, 20:00) | 41 | 95 % |
