(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 | |
|---|---|---|---|
 | A Killer Palindrome Sudoku by by81996672 (on 26. December 2023, 08:35) | 37 |  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 % |
| Production Lines by Mr Toffee (on 5. June 2024, 17:35) | 18 | 96 % |
| 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 % |
| Lagarto by Neokart (on 18. December 2024, 23:11) | 15 | 96 % |
| Anticamel Coloring Book by gdc (on 30. December 2024, 21:26) | 125 | 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 % |
| Raspberry Cream by pieguy (on 6. March 2025, 23:27) | 20 | 92 % |
| German Whisper Border Dots by Md88keys (on 30. June 2025, 04:45) | 56 | 93 % |
| Decagon by Jolly Rogers (on 12. September 2025, 13:04) | 59 | 97 % |
| Bitsum Lines by RockyRoer (on 29. November 2025, 13:26) | 14 | 91 % |
| Vendetta by NicoD (on 14. December 2025, 05:30) | 36 | 96 % |
| Wanna Make You Nine, Better Get In Line by ThePedallingPianist (on 27. December 2025, 14:40) | 20 | 92 % |
| Candles Reconstruction by KNT (on 9. January 2026, 21:28) | 14 | 98 % |
