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leetcode valid sudoku Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contain all of the digits from 1 to 9. largest sudoku puzzle Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible. sudoku printable blank There are several difficulty levels in Sudoku, ranging from easy for beginners to expert for seasoned players. Solving techniques include scanning, cross-hatching, and identifying candidate numbers.
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