Strategy tips
- List the missing digits for a nearly complete row, column, or box.
- Use crossing rows and columns to eliminate impossible squares.
- Recheck the board after every placement because one answer can unlock several others.
Brain game
Sudoku
Complete a classic nine-by-nine number puzzle with logic and focus.
Sudoku
- Select an empty square, then choose a number.
- Every row, column, and box needs the digits 1 through 9.
- Use Clear to change your answer and finish with three or fewer mistakes.
Beat your best
Your personal best is stored only in this browser. Keep playing and watch your skills grow.
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Player guide
How to improve at Sudoku
Sudoku is a logic puzzle in which every row, column, and three-by-three box must contain the digits 1 through 9 exactly once. Start with areas that already contain many given numbers, identify the missing digits, and compare the row and column before placing an answer. Guessing is rarely necessary when you scan methodically.
Frequently asked questions
Is Sudoku free to play?
Yes. You can play instantly in your browser without creating an account or downloading an app.
Can I play on a phone or tablet?
Yes. The game adapts to phones, tablets, and computers, with touch or keyboard controls where appropriate.
How is my best score saved?
Personal bests are stored privately in this browser. Clearing browser data or changing devices may remove them.