(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 | |
|---|---|---|---|
 | Dark Stars by Blobz (on 26. August 2024, 16:00) | 89 |  95 % |
| 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 % |
| A Killer Palindrome Sudoku by by81996672 (on 26. December 2023, 08:35) | 38 | 94 % |
| Squishdoku 245 by Die Hard (on 20. January 2024, 14:11) | 25 | 92 % |
| Heated Sum Loop by yttrio (on 1. March 2024, 21:06) | 44 | 97 % |
| Uncertainty Principle by Tobias Brixner (on 18. May 2024, 16:04) | 12 | 93 % |
| Gridunlocked (Tren Hybrid) by sfushidahardy (on 16. July 2024, 15:47) | 14 | 98 % |
| In Line by jwsinclair (on 14. August 2024, 17:45) | 66 | 95 % |
| Mobius Trip by DubiousMobius (on 8. September 2024, 17:38) | 14 | 90 % |
| Spitting Image by Gene The Supreme (on 16. September 2024, 19:19) | 39 | 95 % |
| A Fistful of Circles (fillomino) by SkepticalMario (on 21. November 2024, 01:01) | 84 | 96 % |
| Lagarto by Neokart (on 18. December 2024, 23:11) | 15 | 96 % |
| Anticamel Coloring Book by gdc (on 30. December 2024, 21:26) | 127 | 96 % |
| One Set of Killer Arrows by Jolly Rogers (on 7. January 2025, 18:50) | 47 | 93 % |
| Circle City by jwsinclair (on 28. January 2025, 18:44) | 72 | 97 % |
| This is how you learn the Time War by pdyxs (on 26. February 2025, 04:51) | 13 | 98 % |
| Fearful Symmetry (Renban Killer) by tallcat (on 28. April 2025, 05:00) | 195 | 97 % |
| German Whisper Border Dots by Md88keys (on 30. June 2025, 04:45) | 56 | 93 % |
