Sudoku

Fill every row, column, and 3×3 box with 1–9.

How to play: Fill in the blank squares so every row, every column, and every 3×3 box contains the digits 1 through 9 exactly once. Given numbers are locked. Tap Check any time to see if you've got it right.

Sudoku became a worldwide puzzle phenomenon in the mid-2000s, and it's stayed popular because the rules never change even though every puzzle does. There's no arithmetic involved — just logic and process of elimination. The easy puzzle here is a good warm-up; the hard one holds fewer starting numbers, so you'll lean more on deduction than on the obvious first moves.

Common Questions

Is this sudoku free to play?

Yes, completely free with no sign-up, no account, and no downloads required.

What sudoku difficulty should a beginner start with?

Start with Easy — it has more given numbers, so simple elimination alone is usually enough to solve it.

Can I check my answers before finishing?

Yes — tap Check at any point to see whether your current entries are correct so far.

Do I need math skills to play sudoku?

No — sudoku uses digits 1 through 9 as symbols, not for arithmetic. It's entirely a logic and placement puzzle.