Free Online Sudoku – Easy, Medium & Hard Puzzles

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How to play Sudoku

You can click How again anytime to open the Guide.

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Fill blank squares

Select a blank square, then choose a number below the board. You can also use your keyboard.

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Use each number once

Every row, column, and 3×3 box must contain the numbers 1 through 9 exactly once.

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Use Draft to note possibilities

Turn on Draft to jot down candidate numbers in a cell. Enter a candidate again to remove it.

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