(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 | |
|---|---|---|---|
 | BYO Arrows by Celery (on 28. October 2023, 22:44) | 36 |  91 % |
| Pluto by lerroyy (on 3. December 2023, 00:24) | 24 | 96 % |
| Wanna Take This Outside? by ThePedallingPianist (on 21. December 2023, 01:09) | 78 | 100 % |
| Chaos Construction: Liars (8x8) by Gliperal (on 22. April 2024, 20:38) | 20 | 92 % |
| Eddies by Qodec (on 12. January 2021, 22:41) | 68 | 99 % |
| Lobster Bisque (Chaos Construction) by Tacosian (on 23. November 2023, 21:57) | 35 | 98 % |
| Chaos Construction: 2nd Region Sight Sum (9x9) by Playmaker6174 (on 26. April 2024, 05:30) | 34 | 98 % |
| A Degree in Thermology by Knickolas (on 26. November 2024, 21:51) | 37 | 97 % |
| String Theory (Renban Incomplete Arrow) by tallcat (on 19. July 2021, 17:03) | 26 | 95 % |
| Roller Coaster mit Extras 25 by Uhu (on 5. March 2022, 08:36) | 24 | 99 % |
| Entropy Exhibition by Mad-Tyas (on 19. September 2023, 12:15) | 50 | 93 % |
| Regional Scores by Big Tiger (on 16. December 2023, 13:45) | 28 | 99 % |
| The Great Overlap by filuta (on 2. February 2024, 16:27) | 22 | 100 % |
| Network by Niverio (on 15. February 2023, 16:20) | 68 | 97 % |
| Chaos Construction: Yin Yang (9x9) by Jesper (on 22. May 2022, 10:39) | 106 | 100 % |
| Extreme Lunchbox 2 by Undar_Beyond (on 21. October 2020, 15:56) | 42 | 97 % |
| 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) | 34 | 96 % |
| Glass Skyscraper Sudoku(P1) by cdwg2000 (on 21. September 2020, 10:20) | 15 | 96 % |
| Chaos Construction: Thermos by XeonRisq (on 8. May 2022, 01:00) | 17 | 98 % |
