Normal Sudoku rules apply. Digits along an arrow must sum to the number indicated in the circle from which the arrow emerges. Digits may repeat along arrows if allowed by other rules.
Solution code: Column 3 from top to bottom.
on 7. June 2026, 08:05 by JVA
Yeah, there's no solution if you assume they're thermos
on 6. June 2026, 21:01 by macintux
Much easier once you remember these are arrows, not thermos.