How to solve Sudoku
Sudoku is a 9×9 square grid split into nine small 3×3 boxes. Place the digits 1–9 so that three rules hold.
- Every row contains each of the digits 1–9 exactly once.
- Every column — once each too.
- And every small 3×3 box — once each.
How to place a digit correctly
Correct
Wrong
Wrong
Wrong
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