(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 | |
|---|---|---|---|
 | Lemures by PulverizingPancake (on 2. September 2021, 20:40) | 77 |  96 % |
| Whisper of the killer snake by Joseph nehme (on 27. August 2021, 18:07) | 34 | 95 % |
| Ship's Wheel by Qodec (on 19. February 2022, 11:09) | 59 | 98 % |
| Candles in the Dark by Dave Sandwich (on 22. November 2022, 23:44) | 67 | 93 % |
| A Puzzle in Two Parts by jsmirob (on 12. December 2022, 05:58) | 76 | 95 % |
| Silk Road (Aquarium Country Road Fillomino) by Agent (on 7. February 2023, 09:00) | 32 | 100 % |
| XY-Differences Fillomino 2 by glum_hippo (on 30. August 2023, 19:51) | 35 | 91 % |
| Geburtstags-Mix Sudoku by Realshaggy (on 24. August 2020, 16:26) | 49 | 96 % |
| Where No Snake Has Gone Before by Nordy (on 13. July 2022, 20:43) | 46 | 99 % |
| Japanese Sums #3: Reef by Myxo (on 17. May 2023, 21:10) | 53 | 95 % |
| Frak Redux (Ten Lines) by tallcat (on 25. October 2023, 09:00) | 48 | 95 % |
| Some Zippers Somedoku by blackjackfitz (on 16. April 2024, 01:59) | 52 | 97 % |
| Höhlen-U-Bahn (Teil 3) by Zzzyxas (on 18. May 2019, 11:31) | 69 | 100 % |
| Anti King XL Thermo Killer by MavericksJD (on 24. October 2020, 20:05) | 28 | 96 % |
| Encaged 9 by Joseph nehme (on 3. January 2021, 12:20) | 66 | 99 % |
| Off with their heads! (Decapitated arrow sudoku) by Aspartagcus (on 8. September 2021, 08:38) | 18 | 98 % |
| Just do the Moth! by Nahileon (on 21. December 2021, 20:43) | 21 | 94 % |
| Tension by wooferzfg (on 19. June 2022, 08:27) | 23 | 94 % |
| Garden Fences by antiknight (on 24. June 2022, 01:44) | 25 | 93 % |
| Ruined Arch by Jay Dyer (on 24. July 2022, 19:30) | 23 | 97 % |
