Sudoku player

Sign in to keep achievements across devices

An account keeps your history, daily challenges, tournaments, settings, and unfinished regular games. Current guest progress is merged after sign-in, while data from other accounts on this device stays separate.

Do not interrupt your current gameAfter signing in or creating an account, you will return to the page you were viewing. Guest progress is still handled by the existing handoff system.

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Continue where you left off.

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Free, using your existing WordPress account.

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An administrator can enable this under Settings → General → Anyone can register.

01Save Classic & Killer Sudoku history

02Keep daily challenge streaks and tournament progress

03Unlock achievement badges

04Keep guest and account data separate

Privacy & controls

Where is your data stored?

Each action below affects exactly one data group. There is no ambiguous “delete everything” button.

Guest mode

On this device

Unfinished game, settings snapshot, quick statistics, and pending results. Storage areas are separated by guest session or account.

Device ID, tutorial state, and board-selection history are only used for the experience on this device; they are not profile data.

On the server as a guest

Submitted results are linked to an anonymous guest ID in a cookie so progress and leaderboard entries remain available for the current guest session.

You can delete only the current guest data without affecting any signed-in account.

Game settings

Reset sound, vibration, shortcuts, hints, and candidates to defaults. Statistics and unfinished games are not deleted.

Regular-play statistics

Delete history and achievements created by regular games. Daily and tournament data is kept so attempt limits and leaderboards remain correct.

Unfinished regular game

Delete Classic or Killer separately. Games in the other mode, completed statistics, and competition results are not affected.

ClassicNo guest game in progress

KillerNo guest game in progress

Delete data for the current guest session

Delete history, achievements, submitted results, settings, and unfinished games for the current guest ID, then create a new guest ID. Signed-in accounts on this device are not deleted.