Sudoku puzzle book for adults from easy to hardSudoku puzzles are the perfect gift for all brain puzzles and sudoku lovers A Sudoku puzzle is defined as a logic-based, number-placement puzzle. The objective is to fill a 9 9 grid with digits in such a way that each column, each row, and each of the nine 3 3 grids that make up the larger 9 9 grid contains all of the digits from 1 to 9. Each Sudoku puzzle begins with some cells filled in. The player uses these seed numbers as a launching point toward finding the unique solution.
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