Help & Support

Yes. An unfinished game, its timer and your notes are saved on this device and restored when you return. Signed-in streaks and ranked scores are also saved to your account.

Everyone receives the same Daily Challenge for the date. Sign in and finish consecutive daily puzzles to preserve your account streak.

Select Sign in, enter your email address and use the verification code sent to your inbox. A Sudoku Chamber profile is created automatically; the verification process is handled securely by the authentication provider.

Each newly completed ranked puzzle adds to one overall total. Easy awards 50 base points plus up to 50 for speed; Medium 100 plus up to 100; Hard 180 plus up to 150; Expert 300 plus up to 200; Evil 420 plus up to 250; and Hell 550 plus up to 300. Every difficulty can also earn up to 50 accuracy points, reduced by 10 for each mistake. The maximum regular scores are therefore 150, 250, 380, 550, 720 and 900. The first completed Daily Challenge of the day adds 75 points. Replaying that day’s challenge is allowed, but it does not add ranked points or increase the streak again.

Players begin in Pearl, followed by Sapphire, Emerald, Ruby and Diamond. Points determine your position within the weekly Global leaderboard; crossing a point total does not immediately change your league. Global rankings show players in your current league and update daily. Finish the week in your league’s top 50 and keep your Daily Challenge streak active to move up one league at the weekly review. If the streak is broken, the account may move down one league.

Open Rankings, choose Friends and share your friend code. Enter another player’s code to send an invitation; accepted friends appear on your social leaderboard.

After your first successful visit, the game can work offline. Offline puzzles remain playable, but they do not award ranked points until a ranked puzzle can be created online.

Select Stats for device statistics, or My Chamber for synced points, league and streak. A guest’s device statistics do not automatically transfer into a later account.

Signed-in members can select Styles at the top of the game and choose among four board designs and four number styles. The selection is saved to the account.

Open Account and select Delete account and synced data. After confirmation, your profile, scores, streak, game records and friend connections are permanently removed.

No. It is a recreational, timed challenge covering verbal comprehension, visual-spatial processing, fluid reasoning, working memory and processing speed. Its Chamber Cognitive Index is not a diagnosis, formal IQ score or Mensa-admission result. Your answers and latest result stay on your device.

Reconnect to the internet, close every tab running The Sudoku Chamber and open the game again. Your browser will retrieve the latest version.