(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 | |
|---|---|---|---|
 | Fours & Fives by Scruffamudda (on 27. November 2023, 02:24) | 12 |  90 % |
| Three in the Corner by DadJokes (on 22. December 2023, 20:54) | 18 | 95 % |
| Outside In by XeonRisq (on 27. December 2023, 03:00) | 11 | 100 % |
| Santa Pesto, Pt. 2 (9x9) by SamuPiano (on 27. December 2023, 18:44) | 14 | 96 % |
| 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 % |
| Meanest Mini by chameleon (on 1. January 2024, 17:10) | 65 | 97 % |
| Epiphany - Chapter III: Beyond the Miracle by Playmaker6174 (on 1. January 2024, 22:00) | 18 | 99 % |
| 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 % |
| Whimsical Whisper Snake by starwarigami (on 27. January 2024, 00:09) | 34 | 100 % |
| Kropki Fillomino 2 by SudokuExplorer (on 20. February 2024, 20:00) | 29 | 97 % |
| Konferenz der Hellseher (Sudoku) by glum_hippo (on 22. March 2024, 05:05) | 22 | 92 % |
| Combinatorial tree by egubachu (on 16. April 2024, 11:09) | 28 | 90 % |
| Double Chillomino by mathpesto (on 18. April 2024, 01:31) | 60 | 100 % |
| Heyawake Country by mathpesto (on 26. April 2024, 15:39) | 41 | 97 % |
| ↻ Somedoku-Loop ↺ by ElChiglia (on 27. April 2024, 07:05) | 31 | 92 % |
| The Order by zetamath (on 18. May 2024, 18:45) | 59 | 96 % |
| LM-Übungsrätsel: Matchmaker by CJK (on 9. June 2024, 17:21) | 21 | 98 % |
| Overstuffed by Oddlyeven (on 19. June 2024, 00:43) | 24 | 96 % |
