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In 1910, Dudeney introduced a puzzle he called "Number Place." This puzzle was a grid divided into nine 3x3 sub-grids, and the goal was to fill in the cells with numbers so that each row, column, and 3x3 sub-grid contained all the digits from 1 to 9 without repetition. blank printable sudoku Sudoku Puzzles also includes a timer and a hint system for those moments when you need a little assistance. penny dell sudoku
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