Sudoku

Aug 23 · 9 × 9

How to play

Fill the grid so every row, every column and every 3 × 3 box holds the digits 1–9, each exactly once.

A few digits are given; the rest is deduction from what already stands.

There is exactly one solution, and it never needs a guess.

A finished grid: the shaded row, column and box each hold 1–9 exactly once — and so does every other one.