(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 | |
|---|---|---|---|
 | Setting the Scene by PjotrV (on 14. October 2021, 15:23) | 42 |  94 % |
| The King With The Arrow by Joseph nehme (on 22. January 2022, 08:12) | 43 | 92 % |
| Position Sums (9x9 Chaos Construction) by ONeill (on 18. October 2022, 16:45) | 46 | 100 % |
| Sum Thing Irregular by tallcat (on 3. November 2022, 19:41) | 40 | 95 % |
| Coelacanth by Kafkapharnaum (on 1. April 2023, 20:20) | 46 | 100 % |
| The Renban Code by juggler (on 18. August 2024, 12:10) | 40 | 94 % |
| Eleven Arrows by EliasKar (on 3. April 2021, 07:44) | 41 | 97 % |
| Goldilocks by SudokuExplorer (on 25. May 2021, 01:00) | 42 | 93 % |
| Battle With The Archers 8 - The Climax: Odd Crossroad by Playmaker6174 (on 19. July 2021, 13:00) | 39 | 97 % |
| The Knights of Ni! Finally Get Their Shrubbery by HalfBakedLunatic (on 12. January 2024, 17:06) | 45 | 92 % |
| Modern Art (Easter Special Edition) by Playmaker6174 (on 1. April 2024, 07:00) | 39 | 97 % |
| Medieval Upheaval 3 by Nordy (on 22. January 2024, 08:30) | 79 | 99 % |
| 14 Standards by JonaS2010 (on 1. April 2020, 14:14) | 131 | 93 % |
| CTC Snake Sum Sudoku by Quarterthru (on 22. September 2020, 04:00) | 39 | 96 % |
| L+ by Joseph nehme (on 25. June 2021, 17:21) | 39 | 96 % |
| Consecutive Sums Sudoku by SudokuExplorer (on 21. October 2021, 22:15) | 37 | 99 % |
| Pennington by wooferzfg (on 6. October 2022, 05:42) | 36 | 96 % |
| Double or Half (killer sudoku + star battle) by Al Fresco (on 14. November 2022, 21:31) | 40 | 95 % |
| Arrow Junkyard by PotatoHead21 (on 17. May 2024, 18:50) | 41 | 95 % |
| From pillar to post - (Killer, Diagonal sudoku) by Mr.Menace (on 30. November 2023, 19:48) | 87 | 95 % |
