(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 | |
|---|---|---|---|
 | Battle With The Archers 28: Between Friends and Enemies (part 2) by Playmaker6174 (on 14. February 2022, 02:50) | 34 |  97 % |
| Wildberry Poptart by Tyrgannus (on 4. August 2022, 11:16) | 136 | 99 % |
| Speak Of The Devil... by Perladel (on 14. September 2022, 13:33) | 37 | 91 % |
| Sea Skeleton [Classic Sudoku] by wisty (on 25. October 2022, 20:28) | 67 | 94 % |
| Diversity Killer by Migu (on 4. June 2023, 00:36) | 33 | 96 % |
| Circles and Between Lines by stimim (on 7. September 2023, 07:10) | 33 | 97 % |
| Cramped for Space by XeonRisq (on 23. April 2025, 18:00) | 35 | 95 % |
| Remnant (Overlaps/Coordinate arrows) by dumediat (on 28. June 2025, 08:00) | 28 | 97 % |
| Intereference by ChinStrap (on 10. September 2025, 20:20) | 30 | 96 % |
| Teamwettbewerb 2011: Rätselstern (Runde 1) by SilBer (on 30. March 2011, 20:52) | 64 | 97 % |
| Anti-Knight Uprising by Scruffamudda (on 4. April 2024, 05:42) | 66 | 94 % |
| Sudoku Variants Series (177) - Frameless Sudoku by Richard (on 18. April 2017, 00:00) | 103 | 93 % |
| Zerteilter Rundweg (4) by BFaw (on 9. October 2012, 10:00) | 36 | 92 % |
| Rudolph? by ThePedallingPianist (on 22. November 2022, 23:38) | 73 | 96 % |
| Smog in the City (Fog, Skyscrapers) by Chilly (on 13. January 2025, 19:52) | 80 | 92 % |
| Magnet+Antimagnet-Verrückte Welt der Pole by r45 (on 11. August 2010, 16:28) | 69 | 92 % |
| Full Lashing by Joseph nehme (on 1. May 2021, 08:34) | 40 | 98 % |
| Battle With The Archers - The 14th Target: Archer's Illusion by Playmaker6174 (on 2. September 2021, 16:13) | 40 | 97 % |
| A Zip of Blood (Vampires, Zippers) by gdc (on 13. March 2024, 17:46) | 43 | 94 % |
| Seance by mathpesto (on 17. February 2025, 23:36) | 80 | 97 % |
