(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 | |
|---|---|---|---|
 | Entangled Between (Entropic lines, Palindrome) by jcgodart (on 12. September 2024, 04:21) | 16 |  95 % |
| Nos482 by starwarigami (on 27. November 2024, 01:51) | 44 | 93 % |
| Snowmen in the Big City by Sedum (on 13. December 2024, 02:00) | 16 | 93 % |
| Interchangeable 2 by palpot (on 29. January 2025, 22:12) | 14 | 95 % |
| phresh out the dryer by aqjhs (on 23. April 2025, 09:51) | 30 | 94 % |
| Twofold arrows by NicoD (on 26. March 2025, 05:15) | 26 | 93 % |
| The Weird E-key by ebiggie (on 6. August 2025, 22:07) | 14 | 93 % |
| What The Flecks?! by NicoD (on 31. August 2025, 05:30) | 64 | 93 % |
| Good and Plenty by Blobz (on 22. October 2025, 16:00) | 164 | 97 % |
| Ben Nevis (Killer) by tallcat (on 30. December 2023, 13:50) | 106 | 97 % |
| Killer Sudoku - Progress City by DiMono (on 14. September 2020, 01:27) | 68 | 97 % |
| Little Killer Sudoku by trivial171 (on 11. May 2020, 00:46) | 55 | 95 % |
| Tilting by SSG (on 2. June 2022, 07:03) | 48 | 100 % |
| Thermosn8kes by Nordy (on 5. August 2022, 08:00) | 56 | 95 % |
| Loopy Whisper X-Sums by yttrio (on 8. June 2024, 04:31) | 87 | 98 % |
| Wichtel 2015 (9): Das Amulett by wichtel (on 6. June 2016, 15:20) | 35 | 97 % |
| Eye of the Beholder by Skunkworks (on 5. June 2022, 01:50) | 38 | 90 % |
| Way out of my way by PrimeWeasel (on 1. September 2022, 20:36) | 38 | 93 % |
| Road and River (Palindrome and Thermo-Region Sum Line) by BenTen (on 26. May 2023, 00:35) | 46 | 93 % |
| Would I lie to you? by juggler (on 17. December 2024, 01:37) | 74 | 96 % |
