(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 | |
|---|---|---|---|
 | K⁴NQ⁴ by DarthParadox (on 11. November 2022, 08:24) | 38 |  91 % |
| Waterworld by Palfly Kampling (on 16. June 2023, 02:37) | 29 | 92 % |
| One Loop, Two Loop by Belamis (on 21. July 2024, 11:48) | 38 | 96 % |
| Ringban Octopus by ThePedallingPianist (on 22. August 2024, 14:23) | 31 | 94 % |
| Pealomino by palpot (on 11. November 2025, 06:00) | 43 | 99 % |
| Whirlwind by SamuPiano (on 2. January 2024, 22:00) | 61 | 98 % |
| Diagonal-Windoku by ibag (on 29. December 2011, 20:09) | 65 | 95 % |
| Pentomino-Hitori by tyskhubi (on 2. August 2014, 09:41) | 32 | 92 % |
| Ramparts by SSG (on 11. October 2021, 12:15) | 18 | 90 % |
| Seventh Night by SSG (on 1. December 2021, 07:07) | 67 | 93 % |
| Phone in your Crossword Puzzle By Olima and PanthChesh by panthchesh (on 8. March 2022, 04:09) | 16 | 90 % |
| The Average Sudoku 2 by Lyun Licuss (on 12. September 2022, 05:39) | 18 | 93 % |
| Aqraf by CJK (on 24. October 2022, 19:49) | 37 | 94 % |
| Production Lines by Mr Toffee (on 5. June 2024, 17:35) | 21 | 93 % |
| Octoquadri Pack (volume 4) by The Book Wyrm (on 3. January 2025, 16:58) | 19 | 96 % |
| Tox Box [Lopsided Arrows Sudoku] by Gene The Supreme (on 29. July 2025, 08:00) | 16 | 90 % |
| Shmiddty business by NicoD (on 11. October 2025, 05:30) | 38 | 94 % |
| Stickier Notes by jwsinclair (on 22. January 2026, 15:08) | 98 | 97 % |
| Oil, Water, Whisper by Blobz (on 22. July 2024, 16:00) | 153 | 96 % |
| Parity Party II - "Little Killer at Summer Camp" by glum_hippo (on 11. April 2020, 20:54) | 52 | 91 % |
