(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 | |
|---|---|---|---|
 | Ice Cream Sandwich by DadJokes (on 27. December 2023, 20:54) | 12 |  91 % |
| Release the Winch! by 99%Sneaky (on 29. December 2023, 18:48) | 36 | 93 % |
| Epiphany - Chapter III: Beyond the Miracle by Playmaker6174 (on 1. January 2024, 22:00) | 19 | 96 % |
| The Knights of Ni! Finally Get Their Shrubbery by HalfBakedLunatic (on 12. January 2024, 17:06) | 48 | 93 % |
| Double Negative by JeremyDover (on 17. January 2024, 21:12) | 28 | 100 % |
| Etch-A-Sketch by ThePedallingPianist (on 24. January 2024, 01:47) | 23 | 93 % |
| Enigmatic Entropic Snake by starwarigami (on 31. January 2024, 00:00) | 31 | 91 % |
| Kropki Fillomino 2 by SudokuExplorer (on 20. February 2024, 20:00) | 30 | 97 % |
| Im Obstgarten (Sudoku) by glum_hippo (on 7. March 2024, 20:17) | 44 | 97 % |
| Wavecatcher by Nordy (on 14. April 2024, 09:00) | 27 | 94 % |
| Combinatorial tree by egubachu (on 16. April 2024, 11:09) | 28 | 90 % |
| Heyawake Country by mathpesto (on 26. April 2024, 15:39) | 41 | 97 % |
| Two Two Tootsie, Good-Bye by Big Tiger (on 9. May 2024, 05:56) | 11 | 90 % |
| The Order by zetamath (on 18. May 2024, 18:45) | 62 | 96 % |
| LM-Übungsrätsel: Matchmaker by CJK (on 9. June 2024, 17:21) | 24 | 97 % |
| Hooked on Sudoku by Blashyrkh (on 18. June 2024, 10:42) | 88 | 94 % |
| The Lost Woods (BotW tribute) by MSDOS (on 3. July 2024, 07:47) | 32 | 93 % |
| Rank Up 09 - Schrödinger by ThePedallingPianist (on 26. July 2024, 02:17) | 20 | 94 % |
| Rank Up 10 - Chaos Construction by ThePedallingPianist (on 27. July 2024, 23:34) | 26 | 96 % |
| Domino Reduction by Calesch (on 30. July 2024, 19:09) | 19 | 94 % |
