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hardest sudoku book 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. expert sudoku strategy Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible. how to solve tough sudoku Many people enjoy solving Sudoku as a relaxing hobby. It provides a sense of accomplishment when a difficult puzzle is finally completed correctly.

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