Solution code: For each column from left to right, give the number of horizontal region borders within that column (in the example puzzle, the solution code would be 1542531).
on 7. January 2026, 15:09 by QuiltyAsCharged
Very nice! Requires thoughtful consideration of the big picture.
If you get stuck, a little birdie whispered these strange words to me: zetamath sudoku stream #384
on 3. December 2025, 14:49 by cyddrdrd
Nice!!
on 3. December 2025, 14:49 by MonsieurTRISTE
The trick and only the trick.
on 1. December 2025, 00:39 by Qodec
And suddenly the clouds vanished, and the bright sun made us see with clarity and wonder.
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