(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 | |
|---|---|---|---|
 | Wonky Numbers by ThePedallingPianist (on 28. November 2022, 23:09) | 15 |  94 % |
| Yin Yang Squares by Celery (on 21. January 2023, 00:04) | 29 | 94 % |
| Palinsums by SenatorGronk (on 25. April 2023, 18:15) | 13 | 91 % |
| Stopwatch by heliopolix (on 25. August 2023, 18:09) | 35 | 93 % |
| Indirect Communication by blackjackfitz (on 19. February 2024, 15:08) | 26 | 97 % |
| Domino Effect by vitaminz (on 12. April 2024, 15:49) | 70 | 96 % |
| Arrow 100 by Mad-Tyas (on 2. September 2024, 13:30) | 26 | 90 % |
| Anticlockwise by juggler (on 22. December 2024, 22:58) | 57 | 97 % |
| Strudel (Killer, Diagonal) by Chefofdeath (on 2. May 2025, 04:28) | 47 | 91 % |
| Union Intersection by morrisjb (on 11. June 2025, 02:46) | 11 | 98 % |
| Red + Blue = Purple by Kaktuslav (on 21. July 2025, 17:54) | 86 | 97 % |
| Crossroads on Another World by JeffWajes (on 12. December 2025, 07:23) | 61 | 97 % |
| Yin Yang Sum Frame Sudoku by flutchman (on 21. December 2025, 21:10) | 82 | 100 % |
| Bahamas by Qodec (on 24. April 2021, 20:43) | 115 | 97 % |
| Yin Doubles Yang (Killer + Yin Yang) by damo_89 (on 8. June 2024, 17:24) | 159 | 97 % |
| Roller Coaster mit Extras 6 by Uhu (on 11. April 2018, 22:43) | 61 | 99 % |
| Sacred Crypt by Allagem (on 6. May 2023, 08:15) | 67 | 95 % |
| Loop With A Difference by Scruffamudda (on 5. May 2023, 00:09) | 51 | 96 % |
| Quantum Chaos (CC, S-Cells) by gdc (on 31. August 2024, 00:26) | 58 | 95 % |
| Little (Killer)^2 by Lisztes (on 30. December 2020, 01:00) | 35 | 96 % |
