This puzzle combines kropki pairs with a negative XV constraint, i.e. adjacent digits cannot sum to 5 or 10. There is no negative constraint on black (or white) kropki dots.
I tried to keep this relatively simple by only using one negative constraint* and breaking up the coloring relatively early. Please let me know in the comments if you would like to see a more intricate version of this.
*most similar puzzles I've found also use negative kropki constraints.
Solution code: Row 1 (9 digits)
on 6. August 2023, 18:10 by Tingo
Very enjoyable puzzle. Thanks for setting and sharing!
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