(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 | |
|---|---|---|---|
 | Snack'O'Mino [Level #2] by Christounet (on 9. March 2023, 12:47) | 54 |  100 % |
| Extreme Lunchbox 2 by Undar_Beyond (on 21. October 2020, 15:56) | 42 | 97 % |
| Sunshine by SudokuExplorer (on 26. January 2021, 02:00) | 42 | 97 % |
| Arrow Garden by PotatoHead21 (on 22. August 2021, 03:52) | 41 | 98 % |
| Zum Geburtstag: Das Geschenk by moss (on 5. October 2017, 23:58) | 30 | 99 % |
| Thermal Galaxy Killer by Alexander Rappa (on 11. July 2020, 15:29) | 36 | 96 % |
| Chaos Construction: Snake by MagnusJosefsson (on 5. June 2021, 13:58) | 45 | 97 % |
| Carousel by twototenth (on 10. August 2021, 08:00) | 27 | 99 % |
| Knotted Arrows by antiknight (on 20. April 2022, 22:34) | 33 | 91 % |
| Syzygies of Susurrus by JayForty (on 3. March 2023, 21:55) | 28 | 92 % |
| Wanna Take This Outside? by ThePedallingPianist (on 21. December 2023, 01:09) | 82 | 100 % |
| DTMF (Dual Tone Multi-Frequency) by ebiggie (on 24. March 2025, 02:58) | 17 | 94 % |
| Consechaos Bonsai by Xenonetix (on 12. May 2025, 19:19) | 33 | 97 % |
| Summation U-Bahn #5: Sorted Clues by Agent (on 22. October 2024, 09:00) | 32 | 97 % |
| a hot summer nightmare by aqjhs (on 21. August 2025, 12:35) | 34 | 100 % |
| Hurricane by SudokuExplorer (on 16. March 2021, 01:00) | 62 | 98 % |
| Flying Arrows by antiknight (on 2. March 2022, 19:36) | 46 | 92 % |
| Castle in the Sky by filuta (on 23. April 2023, 12:35) | 18 | 94 % |
| Order Out Of Chaos by zzw (on 16. November 2023, 00:45) | 41 | 100 % |
| Lobster Bisque (Chaos Construction) by Tacosian (on 23. November 2023, 21:57) | 38 | 99 % |
