The grid has some of the squares filled in, and these pre-filled numbers are called "givens." The Rules Each row, column, and 3x3 subgrid must contain all digits from 1 to 9. sudoku for seniors
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This technique is known as "naked single." Step 2: Use the "Pencil and Erase" Method If you can't immediately find a missing number, try the "pencil and erase" method. sudoku for seniors The objective is to fill the entire grid with numbers from 1 to 16, ensuring that each row, column, and region contains all the numbers without repetition. chicago times sudoku
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