(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 | |
|---|---|---|---|
 | Traces by arbitrary (on 27. April 2024, 22:27) | 79 |  97 % |
| Toffee by pieguy (on 30. April 2024, 04:02) | 35 | 96 % |
| Two Two Tootsie, Good-Bye by Big Tiger (on 9. May 2024, 05:56) | 13 | 92 % |
| Austrian Whispers by sanabas (on 2. July 2024, 17:34) | 14 | 94 % |
| That's three in all four corners by sanabas (on 15. July 2024, 04:08) | 13 | 94 % |
| Living On The Edge by Scojo (on 26. November 2024, 22:35) | 14 | 92 % |
| Some Quads Somedoku by blackjackfitz (on 5. February 2025, 03:56) | 39 | 97 % |
| Fawlty Towers by EdTheAlchemist (on 4. December 2025, 01:00) | 25 | 96 % |
| Supersonic Slingshots by DubiousMobius (on 1. April 2026, 06:08) | 37 | 92 % |
| Tilted (Chaos Construction) by Sotehr (on 25. June 2025, 18:30) | 92 | 96 % |
| Big Latin Y² by Kaktuslav (on 29. October 2025, 08:00) | 74 | 99 % |
| Extraterrestrial Japanese Sums by KNT (on 16. February 2023, 01:26) | 41 | 100 % |
| Riffle Shuffle by 99%Sneaky (on 19. April 2024, 22:52) | 31 | 96 % |
| Call of Cthudoku by juggler (on 17. July 2024, 16:58) | 46 | 99 % |
| Mehrdeutige Rätsel - U-Bahn 3 by Zzzyxas (on 6. September 2017, 00:49) | 42 | 97 % |
| Sandwich Spread by Mark Sweep (on 5. November 2020, 10:00) | 17 | 90 % |
| Checkmate Sudoku by SenatorGronk (on 21. December 2020, 16:26) | 19 | 94 % |
| XV | VX Sudoku by Aspartagcus (on 30. December 2020, 16:28) | 17 | 94 % |
| Nori Nori Killer Sudoku by MavericksJD (on 29. November 2021, 02:22) | 16 | 94 % |
| Serial Locks by twototenth (on 7. December 2021, 12:46) | 15 | 90 % |
