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hardest sudoku To solve a Sudoku puzzle, one must look for cells where only one number is possible, or rows/columns/blocks where a specific number has only one possible placement. sudoku tutorial To solve a Sudoku puzzle, one must look for cells where only one number is possible, or rows/columns/blocks where a specific number has only one possible placement. how to play medium level sudoku Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible.
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