(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 | |
|---|---|---|---|
 | Build Your Own Region Sums by Jay Dyer (on 23. January 2022, 20:27) | 38 |  99 % |
| Chaotic Arrows by mathpesto (on 28. January 2022, 21:20) | 83 | 96 % |
| Kill Kill Kill Kill Kill by Jeet Sampat (on 12. February 2022, 23:52) | 29 | 95 % |
| Killer XL by Jeet Sampat (on 20. February 2022, 08:33) | 24 | 95 % |
| The Lost Lockout Scroll by riffclown (on 4. March 2022, 01:00) | 24 | 98 % |
| Kylo Ren by starwarigami (on 30. March 2022, 02:42) | 47 | 97 % |
| Battle With The Archers 30: Silent Threat II - Hidden Plan by Playmaker6174 (on 1. April 2022, 12:21) | 32 | 96 % |
| Japanische Summen mit 59 by ibag (on 20. April 2022, 23:59) | 33 | 99 % |
| Clothrax by grkles (on 20. April 2022, 06:27) | 18 | 93 % |
| Incendiary Arrows by Miky (on 24. April 2022, 17:32) | 25 | 99 % |
| Reconstructed Pentominoes by mathpesto (on 13. May 2022, 20:31) | 50 | 98 % |
| Correspondence by Jay Dyer (on 17. May 2022, 21:46) | 19 | 93 % |
| Domino Knights by Nell Gwyn (on 20. May 2022, 21:53) | 16 | 93 % |
| Fort Worth by ICHTUES (on 5. June 2022, 06:00) | 29 | 97 % |
| Penrod by krangune (on 25. June 2022, 13:03) | 15 | 91 % |
| Topsy-Turvy by zetamath (on 1. August 2022, 19:41) | 74 | 97 % |
| Medusa by zetamath (on 9. August 2022, 18:01) | 76 | 96 % |
| Matthew 15:14 by Ennead (on 23. August 2022, 01:41) | 29 | 99 % |
| Friendly Ropes (11x11 Deconstruction) by purpl (on 31. August 2022, 17:51) | 30 | 95 % |
| Spoiled Child by Perladel (on 11. September 2022, 11:30) | 13 | 95 % |
