(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 | |
|---|---|---|---|
 | Space Battle by Jeet Sampat (on 14. September 2021, 04:38) | 19 |  93 % |
| Whirlpool by Jay Dyer (on 8. October 2021, 21:23) | 24 | 90 % |
| Aad-van-ced Irregularity by crispy16 (on 14. May 2022, 05:49) | 20 | 91 % |
| Little Talks 2 by djorr (on 8. August 2022, 14:00) | 19 | 93 % |
| ∞ Interfering Loops ∞ by ElChiglia (on 18. October 2023, 18:37) | 39 | 97 % |
| Merry-Go-Round by Xenonetix (on 18. December 2025, 17:17) | 20 | 92 % |
| Archery Contest: XV by I Love Sleeping (on 17. November 2024, 03:21) | 79 | 97 % |
| Wichtel 2016 (5): Stallungen am Nordpol by wichtel (on 12. June 2017, 22:00) | 33 | 96 % |
| Degraded Cells (Juggler Impression) by gdc (on 9. September 2024, 18:15) | 41 | 96 % |
| Temperamental Triplets by rockratzero (on 16. September 2022, 17:34) | 65 | 96 % |
| LM 2018 Countdown: A 38 (1) by tuace (on 2. June 2018, 09:06) | 42 | 95 % |
| Constellation Sudoku by Gliperal (on 29. August 2020, 10:08) | 20 | 93 % |
| Build Your Own Anti-Knight Sudoku by DiMono (on 24. October 2020, 17:41) | 20 | 94 % |
| Leapfrog Sudoku by stephane.bura (on 3. December 2020, 20:00) | 19 | 97 % |
| Whirlpool by Xailran (on 20. September 2021, 13:04) | 17 | 91 % |
| Dumbbells by djorr (on 29. March 2022, 14:00) | 23 | 97 % |
| Pieces of the Puzzle by grkles (on 22. February 2022, 01:39) | 21 | 99 % |
| Unlucky Killers by bodemeister (on 9. May 2023, 03:02) | 20 | 94 % |
| Target Acquired by Scojo (on 28. January 2024, 22:54) | 21 | 94 % |
| Pealomino by palpot (on 11. November 2025, 06:00) | 38 | 99 % |
