Between two green cells in the same row or column, the sum of those cells must appear as one digit between them. This does not apply if there is a third green in the middle.
A valid example can be seen to the right.
Normal Sudoku rules apply.
Try it at F-Puzzles.
Solution code: Digits from second row.
on 13. October 2021, 18:16 by Ragna
Very nice idea! :-))
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