SuDoKu 3.1

"Sudoku is a number placement puzzle. The aim of the puzzle is to enter a number from 1 through 9 in each cell of a grid, frequently a 9×9 grid made up of 3×3 subgrids (called "regions"), starting with various numbers given in some cells (the "givens"). Each row, column and region must only contain one instance of each number. Completing the puzzle requires only patience and modest logical ability, although some puzzles can be fiendishly difficult. Its classic grid layout is reminiscent of other newspaper puzzles such as crosswords and chess. Sudoku initially became immensely popular in Japan in 1986 and in the UK, Israel, and Canada in 2005, stimulating international interest. This version not only makes puzzles and allows the user to complete them, but also can be used as a solver for other sudoku puzzles that a player may want a solution for.

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