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sudoku washington post Sudoku variants like Killer Sudoku, Jigsaw Sudoku, and Sudoku-X provide additional challenges for players looking for something different from the classic version. printable hard sudoku puzzles 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 do you say sudoku Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible.

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