Given But Hidden
(Published on 30. June 2025, 19:23 by marty_sears)
Rules:
Normal sudoku rules apply.
Some cells in the grid contain a given digit, and these have all been circled. A circled given digit indicates how many times that digit appears as a circled given digit in the grid.
Unfortunately, most of these given digits are obscured by fog. Entering a correct digit will clear the fog in that cell, and maybe other cells too. No guessing is necessary.
If a black dot connects two digits, then one is double the other.
The two digit number to be discovered in the blue frame (reading left to right) will indicate the total number of circled given digits that exist in the grid.
Solution code: Row 3 from left to right
Comments
on 7. July 2025, 18:04 by PKMKII
Absolutely impeccable logic, the interactions between the outer “ring” and the fog was so original.
on 7. July 2025, 07:06 by Norkas
Very fun idea and executed well with some sprinkles of Marty sillyness.
on 5. July 2025, 16:32 by PancakePie
Beautiful work again!
on 4. July 2025, 18:11 by jakestilesowen
I think dynamic fog might be the most overpowered mechanic for making sudoku, and Marty has used it excellently here.
on 3. July 2025, 11:31 by Asparagus
This delightful creation has to be up there with your very best dynamic fog puzzles, Marty.
A joy to solve from start to finish.
on 3. July 2025, 01:27 by vfig
fantastic concept, almost perfectly implemented!
on 1. July 2025, 23:43 by mscha
Whew! That was hard, but oh so beautiful.
Been stuck on this for a long time (missed an easy 9). Gave it one more try before watching Simon's solve, and eventually got it.
on 1. July 2025, 21:04 by Franjo
A surprising twist on Counting Circles! I couldn’t resist to smile when putting in the last digit under the fog. Amazing! Thank you so much for creating and sharing another piece of your beautiful puzzle-art.
on 1. July 2025, 11:41 by bboom
Awesome puzzle, I loved how it flowed and how it makes you constantly switch between counting sums and regular sudoku logic.
on 1. July 2025, 04:21 by harwiltz
Beautiful from start to finish. One of the best puzzles I've played in a long time!
on 1. July 2025, 01:14 by cygne
Very fun, loved how the two digit number came into play
on 1. July 2025, 00:01 by ViKingPrime
He can't keep getting away with this.
on 30. June 2025, 23:46 by Exigus
Amazing. Thanks!
on 30. June 2025, 23:17 by nunc
Beautiful twist on the theme. I loved it a lot!
on 30. June 2025, 20:31 by sujoyku
A brilliant idea, perfectly executed. Thank you for setting and sharing this gem, Marty!
on 30. June 2025, 20:00 by arctan
lovely flow, a natural progression from one idea to the next while also occasionally revisting previous parts to unveil even more logic and secrets
on 30. June 2025, 19:38 by Flinty
Gorgeous! :)
