Logic Masters Deutschland e.V.

Hi all, this is the fourth puzzle in my series of parity puzzles with this ruleset. The break-in on this one is a bit subtle but I think the solve is very beautiful. Have fun!

Rules:

Normal sudoku rules apply.

Circled digits indicate how many of the up to 9 cells surrounding the circle (including itself) have the same parity (even/odd) as itself. Not all such circles are necessarily given.

Play in the CTC App

If you enjoyed this puzzle and the logic of the circles indicating parity, check out the previous puzzles in this series, Parity Hilarity, Parity Pecularity, and Parity Singularity. (My personal favorite of these three is Parity Singularity.)