Normal Sudoku rules apply.
No digit may be in a ratio of 1:N with its orthogonal neighbors, where N is 2, 3, or 4.
The grid is covered in fog; entering a correct digit will clear that cell's fog, and may clear fog elsewhere in the grid. No guesswork is required.
Solution code: Row 8.
on 6. October 2026, 11:04 by Rawcoder
I really enjoyed this one. Thanks.
on 4. October 2026, 23:10 by VitP
it may seem like you have to goodliffe the grid to death, but you don't
on 4. October 2026, 12:08 by 91loves
What a fun constraint, I enjoyed this immensely!
on 4. October 2026, 08:28 by Martina
Very nice flow, thank you.
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