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Goal: Fill in the numbers 1-9 in the 9×9 grid so that each row, column, and each 3×3 box contains the numbers 1-9
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Computer: Click on a cell, then click on a number or use the keyboard (1-9)
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Phone: Click on a cell, then select a number from the bottom panel
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Notes: Enable note mode to add small numbers as reminders
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Hint: Use the hint feature carefully - it's helpful but it affects your score