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
|
|---|
 | Unboxing (11x11 deconstruction)
by jwsinclair (on 13. December 2024, 20:15) | 93 | 
96 %
|
| Wichtel 2018 (6): In der Wichtelbäckerei
by wichtel (on 9. December 2019, 01:28) | 40 |
100 %
|
| Renban Arrow sudoku
by udukos (on 2. June 2021, 22:13) | 41 |
96 %
|
| Bicycles
by SirSchmoopy (on 27. September 2021, 05:19) | 40 |
98 %
|
| Das Boot - GW and DW Sudoku
by Mr.Menace (on 19. November 2021, 09:31) | 41 |
92 %
|
| Sisyphos Fillomino (10x10)
by Jesper (on 14. November 2022, 15:00) | 40 |
100 %
|
| Steamed 'Bans (chaos construction with region sum clues)
by SkepticalMario (on 5. September 2024, 00:00) | 86 |
97 %
|
| Für pin7guin zum Geburtstag: Buchstaben-Kropki auf Magnetplatten
by CHalb (on 6. September 2018, 23:58) | 40 |
99 %
|
| Compass Fillomino #2
by MagnusJosefsson (on 8. April 2021, 18:35) | 46 |
97 %
|
| Serial BoX
by twototenth (on 23. November 2021, 08:00) | 47 |
96 %
|
| Shindig Redone (Anti-Knight, Renban)
by juddimal (on 4. January 2025, 00:43) | 103 |
98 %
|
| Chaos Deconstruction: Japanese Sum Cross the Streams Cipher
by abed hawila (on 30. March 2023, 17:02) | 47 |
97 %
|
| Framing In The Park
by Niverio (on 14. April 2023, 19:33) | 43 |
96 %
|
| Vice Versa (Region Sum Lines Sudoku)
by Mr.Menace (on 23. June 2023, 09:30) | 95 |
93 %
|
| What's Literally Eating Gilbert Grape
by Thorsby (on 11. December 2022, 08:06) | 46 |
97 %
|
| Hole Lotta Lots (Black Hole)
by gdc (on 14. November 2025, 15:14) | 46 |
97 %
|
| Reticulated Python
by mathpesto (on 27. March 2022, 04:58) | 95 |
97 %
|
| Dimorphism
by Jay Dyer (on 19. April 2023, 10:34) | 92 |
97 %
|
| Is V Greater Than, Less Than, or Equal to 5? (Original)
by HalfBakedLunatic (on 6. May 2024, 00:00) | 58 |
95 %
|
| Friendly Borders
by Prof.Dori (on 15. August 2024, 23:58) | 48 |
92 %
|
