(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 | |
|---|---|---|---|
 | Index-istential Crisis (with ChinStrap) by sujoyku (on 19. January 2025, 13:39) | 43 |  97 % |
| Fifth Wheel by IcyFruit (on 27. February 2025, 14:27) | 93 | 99 % |
| Redshift by ThePedallingPianist (on 6. September 2025, 22:05) | 23 | 98 % |
| LUSTIG - großes Buchstabenrätsel / big Letter Puzzle by DocLogic (on 24. September 2025, 17:09) | 20 | 97 % |
| Killer Shikoku by the_cogito (on 9. March 2022, 00:16) | 62 | 96 % |
| Ocean by kolot (on 15. August 2021, 07:58) | 39 | 98 % |
| Assorted Sandwiches Sudoku by stephane.bura (on 15. June 2020, 14:37) | 22 | 95 % |
| arROw SudOkU rEduX by filuta (on 20. April 2021, 13:49) | 18 | 93 % |
| Y Are We Whispering? by glum_hippo (on 18. September 2021, 04:12) | 36 | 94 % |
| Stepwell by mormagli (on 14. May 2022, 07:17) | 20 | 93 % |
| Sum Kind of Maze by mormagli (on 28. July 2022, 19:24) | 18 | 92 % |
| Japanese Sums Nurikabe Arrows (9x9) by Xendari (on 1. January 2023, 08:55) | 16 | 95 % |
| Hybrid Star Battle Series (017) - Easy as ABC by BenceJoful (on 6. May 2023, 01:45) | 18 | 97 % |
| Is 4 a Low Digit? by blackjackfitz (on 30. August 2023, 03:23) | 24 | 92 % |
| Rhizome (Fillomino/Landvermessung/Irrwisch) by dumediat (on 13. September 2023, 13:06) | 16 | 96 % |
| Deconstruction of Whisper Tree (11x11) by SparkNights (on 4. February 2024, 07:05) | 40 | 97 % |
| Schrödinger's Knights by lepton (on 9. March 2024, 11:50) | 17 | 92 % |
| Dust Torus (Black Hole) by heliopolix (on 14. September 2024, 00:00) | 22 | 98 % |
| Canyonlands (A38 + Rassi Silai) by sfushidahardy (on 16. March 2025, 17:07) | 17 | 93 % |
| Tentropic Terrier by Scojo (on 11. June 2025, 20:06) | 19 | 97 % |
