About Sudoku
Sudoku is the world's favorite logic puzzle. Fill the 9×9 grid so every row, column and 3×3 box contains the digits 1–9 with no repeats. Pure deduction, infinite puzzles, and a calm focus that keeps players coming back daily.
How to play
Click a cell and type a number. Fill every row, column, and 3×3 box with the digits 1–9, no repeats. Use notes to track candidates.
Tips & strategy
- Start with rows, columns, or boxes that are nearly full.
- Pencil in candidates, then eliminate as you place numbers.
- Look for a digit that fits only one cell in a unit.
- Never guess — every solvable Sudoku yields to pure logic.
Want to get good? Dive into our in-depth Sudoku guide for tips, strategy, and everything you need to climb.
