(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 | |
|---|---|---|---|
 | X-Distance Sudoku(2)——Hard by cdwg2000 (on 18. November 2020, 16:47) | 26 |  92 % |
| 真笑Puzzles031--69Sandwiches (5)--Nonconsecutive Double Sandwich by cdwg2000 (on 28. February 2021, 10:46) | 12 | 93 % |
| Killer Sudoku 311 by Quarterthru (on 20. March 2021, 12:00) | 34 | 97 % |
| Quetzalcoatl by Tyrgannus (on 24. September 2021, 21:29) | 54 | 94 % |
| Smörgåsbord by Qodec (on 2. November 2021, 23:17) | 56 | 95 % |
| Archer's Prologue: Positive Mindset by Playmaker6174 (on 13. November 2021, 06:05) | 60 | 98 % |
| Thermosnakes by Nordy (on 21. April 2022, 08:00) | 41 | 94 % |
| Riverbank - Episode 3: Watch on the Rhine by henrypijames (on 6. May 2022, 14:48) | 14 | 100 % |
| Übungsrätsel für die LM 2022: Bewegung bitte! by lupo (on 17. June 2022, 12:00) | 13 | 98 % |
| Doublomania by lepton (on 3. January 2023, 21:14) | 28 | 98 % |
| Kropkikabe by MmeMagique (on 28. May 2023, 18:00) | 25 | 92 % |
| Little Killer Sandwiches by Jreg (on 6. September 2023, 07:00) | 69 | 93 % |
| Fisherman by pep9 (on 6. October 2023, 10:46) | 13 | 100 % |
| ☯ Yin-Yang-Loop ☯ by ElChiglia (on 1. April 2024, 00:17) | 31 | 93 % |
| Mystery Cages Somedoku by blackjackfitz (on 18. September 2024, 01:13) | 42 | 91 % |
| Negative Space by ViKingPrime (on 26. December 2024, 02:35) | 32 | 94 % |
| Redundancies by vitaminz (on 29. April 2025, 22:25) | 14 | 93 % |
| AUTO - Buchstabenrätsel / Letter Puzzle by DocLogic (on 2. June 2025, 16:52) | 27 | 94 % |
| Carouselambra by kuraban (on 16. November 2025, 05:30) | 49 | 91 % |
| Snowtropics 3 by SecondBlue (on 17. December 2025, 06:00) | 18 | 93 % |
