Sudoku

Fill the 9×9 grid so that every row, every column, and each of the nine 3×3 sub-grids contains all of the digits from 1 to 9. No maths required — just pure logic.

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  1. The grid is divided into rows, columns, and boxes.
  2. Some cells already contain digits — these are your starting clues.
  3. Fill every empty cell with a digit that fits the rules.
  4. Each row must contain all digits with no repeats.
  5. Each column must contain all digits with no repeats.
  6. Each box must contain all digits with no repeats.
  7. Use pencil marks to track candidates in a cell.

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