(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 | |
|---|---|---|---|
 | Odd Pentominoes on the Loose by JeffWajes (on 31. July 2022, 05:52) | 30 |  97 % |
| Half-Baked by tesseralis (on 24. August 2022, 10:41) | 45 | 98 % |
| [Fog of War Series] 17.Rule Breakers by AstralSky (on 15. February 2023, 03:58) | 63 | 95 % |
| Snakomino Warp Zones [Level #3] by Christounet (on 11. April 2023, 22:22) | 26 | 99 % |
| 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) | 61 | 93 % |
| Reflection by Chad (on 25. July 2023, 18:29) | 28 | 98 % |
| 247, 368... by twototenth (on 26. September 2023, 08:00) | 23 | 93 % |
| vpermb by zzw (on 25. October 2023, 05:30) | 28 | 99 % |
| Pluto by lerroyy (on 3. December 2023, 00:24) | 26 | 96 % |
| Chaos Destruction X-Sums by lepton (on 18. February 2024, 08:07) | 33 | 92 % |
| X (Chaos Construction) by tallcat (on 11. April 2024, 07:00) | 71 | 97 % |
| Captain Calamari (Somedoku, Octopus) by ThePedallingPianist (on 18. May 2024, 02:02) | 22 | 93 % |
| Shade Your Own Puzzle: YinYang vs Sudoku #2 by Playmaker6174 (on 27. September 2024, 09:00) | 25 | 98 % |
| Chaotic Target Practice by KenGlue (on 11. November 2024, 20:04) | 43 | 98 % |
| Megascops Asio by Sniglett (on 21. February 2025, 01:39) | 18 | 98 % |
| Beyond the Antihorizon (Black Hole) by heliopolix (on 7. March 2025, 18:04) | 15 | 98 % |
| Cage Play 6: Killer 357 Multiples by HalfBakedLunatic (on 18. May 2025, 17:50) | 21 | 94 % |
| Yin Yang Sudoku Deconstruction [9x9] by Christounet (on 7. April 2024, 09:21) | 105 | 98 % |
| Antimatter by Nahileon (on 19. December 2022, 21:19) | 55 | 96 % |
