(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 | |
|---|---|---|---|
 | ✚ Whisper-me-Sum-thing Loop ✚ by ElChiglia (on 9. December 2023, 07:15) | 33 |  90 % |
| In Chaos there is Order by Ali M (on 15. March 2024, 21:55) | 32 | 92 % |
| Constance by lerroyy (on 17. May 2024, 11:20) | 29 | 100 % |
| N-Lines by Qodec (on 6. August 2025, 16:53) | 27 | 93 % |
| Entropy Times 10 by Md88keys (on 3. February 2026, 04:42) | 32 | 93 % |
| Rätselsuppe III by Luigi (on 30. June 2010, 08:04) | 78 | 97 % |
| Top Right Boi [CC] by SennyK (on 3. May 2026, 06:00) | 54 | 96 % |
| Archers and Knights by SudokuExplorer (on 23. March 2021, 01:00) | 104 | 98 % |
| The Final Fourteen by FryTheGuy (on 20. October 2021, 05:38) | 29 | 96 % |
| Wordless Kakuro by qiuyanzhe (on 26. November 2021, 08:34) | 23 | 90 % |
| Vampires Magnet Butterfly by damasosos92 (on 15. April 2024, 16:40) | 28 | 93 % |
| Push and Pull by arbitrary (on 29. August 2024, 00:54) | 47 | 97 % |
| Renban Non-con by yttrio (on 21. April 2023, 20:26) | 47 | 96 % |
| Powercut [S-cell, Renban, RSL] by Christounet (on 30. June 2023, 23:48) | 42 | 100 % |
| Product Sum Yin Yang by Scojo (on 17. June 2025, 04:10) | 42 | 93 % |
| Evil Eyes 4 v. 4 by Luigi (on 17. June 2010, 14:45) | 20 | 97 % |
| Chaos Construction: Color Mixing by KNT (on 15. May 2022, 17:41) | 42 | 97 % |
| Geometry Experiment 2 by Jeet Sampat (on 5. March 2023, 14:25) | 24 | 91 % |
| [159] Di-Again-y! by ThePedallingPianist (on 11. October 2023, 01:47) | 21 | 91 % |
| Build Your Own Nuri-Maze #2: Oddsweeper Square by Myxo (on 26. January 2024, 20:13) | 23 | 93 % |
