(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 | |
|---|---|---|---|
 | Vampire Whispers by yttrio (on 19. May 2023, 15:27) | 28 |  97 % |
| Highway to the Danger Zone by Jay Dyer (on 23. May 2023, 21:52) | 63 | 93 % |
| Reflection by Chad (on 25. July 2023, 18:29) | 29 | 98 % |
| 247, 368... by twototenth (on 26. September 2023, 08:00) | 24 | 93 % |
| Happy Birthday Bellsita: Supernatural Sums by wisty (on 26. September 2023, 10:13) | 18 | 97 % |
| Pluto by lerroyy (on 3. December 2023, 00:24) | 27 | 96 % |
| Saturnalia by mathpesto (on 13. January 2024, 05:19) | 101 | 93 % |
| Round totals reclining stucco deconstruction. (8, 7) by Oddlyeven (on 7. February 2024, 18:32) | 30 | 95 % |
| Cosmogony by Kafkapharnaum (on 25. March 2024, 17:31) | 49 | 98 % |
| Yin Yang Sudoku Deconstruction [9x9] by Christounet (on 7. April 2024, 09:21) | 106 | 98 % |
| Party chaos by Lizzy01 (on 27. June 2024, 21:43) | 36 | 99 % |
| Schrödinger 302: Schrödinger's Octopus by ViKingPrime (on 5. May 2024, 11:45) | 37 | 97 % |
| Shade Your Own Puzzle: YinYang vs Sudoku #2 by Playmaker6174 (on 27. September 2024, 09:00) | 25 | 98 % |
| Abstruse by Andrewsarchus (on 28. September 2024, 23:11) | 13 | 93 % |
| Chaotic Target Practice by KenGlue (on 11. November 2024, 20:04) | 44 | 98 % |
| One Of Two by Manta-Ray (on 18. November 2024, 15:36) | 26 | 91 % |
| Megascops Asio by Sniglett (on 21. February 2025, 01:39) | 18 | 98 % |
| Rotterdam by ThePedallingPianist (on 26. September 2025, 18:56) | 17 | 92 % |
| Focus Point by oklux (on 1. December 2025, 10:12) | 26 | 93 % |
| Lohkous Fillomino by Agent (on 15. March 2026, 09:00) | 31 | 99 % |
