Normal Sudoku rules apply. Digits separated by a white dot are consecutive. Digits separated by a black dot must have a 1:2 ratio. Not all possible dots are necessarily given.
Solution code: Row 3, Column 6
on 22. December 2025, 20:05 by Djirt
Спасибо, потрясающая головоломка!
on 21. November 2025, 06:20 by Richard
This puzzle has been sitting in my pile of 'must solve's' for ages. Complete with coffee stains and wrinkles in the paper. Although I am a big fan of negative constraints, I noticed the patterns of well placed dots immediately and was very curious of the exact impact of it. During my last holiday I finally took the time to figure it all out. Very clever setting that leads to an elegant flow in the solve. This is such a puzzle that deserves far more solves!