(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 | |
|---|---|---|---|
 | Emulsion by FKlauser (on 16. June 2023, 11:11) | 67 |  96 % |
| Killer Trainline (Tren + Sudoku Hybrid) by rockratzero (on 28. June 2023, 02:36) | 17 | 95 % |
| 3’s A Charm - Kropki/Arrow Sudoku by Mr.Menace (on 24. July 2023, 20:46) | 44 | 92 % |
| Whose Doubler Is It Anyway? by ViKingPrime (on 23. August 2023, 12:30) | 67 | 97 % |
| Clapping on the 1 and 3 by cristophermoore (on 6. November 2023, 00:00) | 85 | 94 % |
| Betwen ty by glum_hippo (on 12. November 2023, 00:41) | 36 | 94 % |
| The Prophecy (Zippular Lines #1) by heliopolix (on 15. December 2023, 00:43) | 36 | 95 % |
| Circles and Adders by Jay Dyer (on 24. December 2023, 12:04) | 40 | 96 % |
| Zipper Sandwich by RockyRoer (on 17. January 2024, 15:23) | 36 | 97 % |
| Squishdoku 245 by Die Hard (on 20. January 2024, 14:11) | 25 | 92 % |
| Saturated Chaos by Jeet Sampat (on 3. March 2024, 09:47) | 20 | 93 % |
| Uncertainty Principle by Tobias Brixner (on 18. May 2024, 16:04) | 12 | 93 % |
| Friendlynori by Calesch (on 16. July 2024, 01:02) | 20 | 96 % |
| Gridunlocked (Tren Hybrid) by sfushidahardy (on 16. July 2024, 15:47) | 15 | 98 % |
| Misdirection (Global Entropy) by ProRock (on 19. July 2024, 15:42) | 34 | 90 % |
| In Line by jwsinclair (on 14. August 2024, 17:45) | 68 | 95 % |
| What Fools These Mortals Be by The Bard (on 15. August 2024, 19:59) | 23 | 91 % |
| Spitting Image by Gene The Supreme (on 16. September 2024, 19:19) | 39 | 95 % |
| Hammerhead Shark by Lizzy01 (on 18. February 2025, 16:28) | 61 | 92 % |
| Lagarto by Neokart (on 18. December 2024, 23:11) | 15 | 96 % |
