Normal Sudoku rules apply.
The four digits surrounding a black dot have a sum NOT divisible by three. All such possible dots are given.
Each digit N appears N times within the circles.
Solution code: The nine digits from the first row.
on 8. March 2025, 00:39 by Morgenstern
Changed wording.
on 8. March 2025, 00:26 by Morgenstern
Clarifying ruleset and adding sudokupad link.
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