Play Sudoku online, free
Sudoku is the classic number-placement puzzle: fill every empty cell so each row, column and box contains every digit exactly once. This version has 4x4, 6x6 and 9x9 grids, so newcomers and regulars can both find a size that fits, plus a pencil tool for jotting down candidates. Each puzzle is generated fresh in your browser.
How to play Sudoku
- Tap an empty cell, then choose a digit to place in it.
- Each row, each column and each box must contain every digit exactly once.
- Switch on the pencil tool to note candidate digits before you commit.
- Every puzzle has exactly one solution, so you can always reason your way to it.
Tip: Scan for a row, column or box that is missing only one or two digits and start there.
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