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Play Killer Sudoku Online

Play a complete 9x9 Killer Sudoku with standard row, column, and box rules, 36 contiguous arithmetic cages, cage sums with no repeated cage digits, three starter-clue levels, number-pad and keyboard entry, clearing, mistake and cage tracking, completion detection, and restart. Play free with no account or download.

Choose puzzle level

Single-player puzzle

No multiplayer mode

Your turnScore 0

How to play

Play a complete 9x9 Killer Sudoku with standard row, column, and box rules, 36 contiguous arithmetic cages, cage sums with no repeated cage digits, three starter-clue levels, number-pad and keyboard entry, clearing, mistake and cage tracking, completion detection, and restart. Choose a puzzle level, make your move, and use Restart whenever you want a fresh game.

Strategy tips

  • Every row, column, and 3 by 3 box still uses digits 1 through 9 exactly once.
  • Digits inside each outlined cage must total its small corner sum without repeating.
  • Combine cage totals with row, column, and box exclusions before committing a digit.

FAQ

Is Killer Sudoku free?

Yes. It is free to play in your browser.

Do I need an account?

No account or email is required.