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Ensure that each row, column, and box contains all the digits from 1 to 9, and that there are no repetitions. seniors sudoku

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Single Candidate Strategy: Identify cells with only one possible number based on the numbers already placed in the row, column, and box. seniors sudoku It follows the same basic rules: a 9x9 grid divided into nine 3x3 subgrids, and the objective is to fill the grid with numbers 1 to 9 such that each row, column, and subgrid contains all the digits exactly once. advanced sudoku tips