Sudoku is a free daily number puzzle where you fill a 9ร9 grid so every row, column, and 3ร3 box contains digits 1 through 9. Choose Easy, Medium, or Hard difficulty. Features pencil marks, timer, and mistake counter.
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Fill the 9ร9 grid so every row, column, and 3ร3 box contains digits 1โ9 exactly once. Tap a cell, then tap a number. Use Notes mode to pencil in candidates.
Start with rows/columns that have the most given digits. Use elimination to narrow candidates. Look for "naked singles" โ cells where only one number can go.