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.
If you enjoyed this puzzle and the logic of the circles indicating parity, check out my previous puzzle, Parity Hilarity:
Solution code: Column 8
on 15. May 2024, 07:26 by SudokuHero
not all such circles are given *or* not all such circles are necessarily given?
---
Reply: Thanks for the note, I changed the wording.
on 14. May 2024, 07:03 by yanggang
I fixed a mistake in the original upload (one of the circles was in the wrong position).
on 14. May 2024, 05:17 by johnyzzh
May you check the puzzle is somehow wrong.
--
Reply: You are right, I fixed it. Thank you for pointing this out!