Befuddlement
(Published on 8. July 2025, 03:01 by Oddlyeven)
Rules: Normal Sudoku rules apply. Put the digits 1 to 9 once each into every row, column and box.
Dynamic Fog: The grid is covered in fog. Placing a correct digit will remove the fog from its cell and possibly other cells in the grid.
Doublers: One cell in each row, column and box is a doubler. The value of a doubler cell is equal to twice its digit. Each of the digits from 1 to 9 appears in a doubler cell.
Uniqueness: On each of the constraints below, values do not repeat anywhere in the puzzle. For example, if there is a 2 on a parity line, 2 or double 1 can't appear anywhere else on a parity line, but double 2 could because it has a value of 4.
Whispers: Adjacent values on a thin green line differ by at least 5.
Renban: Values on a thick purple line form a set of consecutive numbers with no repeats.
Parity: Adjacent values on a hollow red line must alternate between odd and even.
High: A value on an orange circle must be greater than 5.
Low: A value on a blue square must be lower than 5.
Links:
SudokuPad: https://sudokupad.app/w6uzuj1m0m
Solution code: Row 2, left to right (9 digits).
Comments
on 25. July 2025, 10:00 by Christounet
Really fun! Thanks :)
on 17. July 2025, 14:48 by schlichtner
What a brilliant puzzle that is! Interactions between clues are amazing.
on 14. July 2025, 07:38 by grrz
read all rules carefully and you’ll solve it easily
on 11. July 2025, 22:35 by Snue
Amazing puzzle. The constraints play so well with each other. This is my first encounter with the uniqueness rule - It is used beautifully in this puzzle. I love it :)
Thanks for setting the puzzle :)
on 11. July 2025, 10:00 by Playmaker6174
This might be one of the nicest (yet intricate) fog puzzles I've solved so far, and I've solved plenty of fog puzzles too. x)
Every part felt so precise and cleverly crafted that I actually had to stop for a while to think of some of the steps in the middle, and every constraint had their own remarkable moments there!
on 10. July 2025, 21:41 by Exigus
Loved it. Really well constructed. Thanks!
on 9. July 2025, 15:29 by madhupt
Brilliant puzzle! Beautiful deductions all the way.
on 9. July 2025, 04:22 by cam
That had a very nice flow! The doublers reinvigorate some of these constraints. It's not just turning a crank anymore; you have to actually use your brain.
on 9. July 2025, 02:08 by cozmic72
Don’t make the mistake I made and get befuddled by the orange circles. They are NOT supposed to be odd values… once I caught that error, the solve continued to be a very pleasant journey around the grid. Great stuff, beautiful puzzle.
on 8. July 2025, 22:41 by rdesmarais2
Awesome puzzle that indeed did befuddle me for a bit.
on 8. July 2025, 20:47 by Snookerfan
Very nice! Pretty hard when you don't look in the right place at the right tima as I did, but really fun. Thank you
on 8. July 2025, 18:30 by Myfyr MJ
That was tough, took over 45 minutes and was a struggle. Over my pay grade sudoku-wise! The puzzle is aptly named!
on 8. July 2025, 17:51 by LehanLehan
What a beautiful and tasty logic throughout, thank you very much for the puzzle.
on 8. July 2025, 10:28 by rameshsrivats
Great puzzle. Absolutely fantastic. Maybe I just got lucky by asking the right questions at the right time, but I thought it was closer to 3* difficulty.
on 8. July 2025, 07:38 by Fra314
Beautifully crafted, lots of mindblowing interactions cause of the uniqueness and a very fair but challenging puzzle overall. A real gem.
on 8. July 2025, 05:04 by Elliott810
Absolutely brilliant puzzle! Take a bow and thank you:)
