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Instructions

Sudoku requires no calculation or arithmetic skills. It is essentially a game of placing numbers in squares, using very simple rules of logic and deduction. Each row of nine cells must contain each of the numbers from 1 to 9 once and only once.
 Each column of nine cells must contain each of the numbers from 1 to 9 once and only once.
 Each of the nine 3 by 3 boxes of nine cells must contain each of the numbers from 1 to 9 once and only once.
