Sudayku

Sudayku is your morning sudoku.

Every night at midnight, four fresh puzzles appear: easy, medium, hard and expert. Everyone plays exactly the same ones, so times are actually comparable. Solve one over coffee and the rest whenever you like.

DAILY LEADERBOARD Your time counts towards that day's leaderboard. Mistakes and hints cost one minute each, so calm and clean often beats rushed. In the evening you hear where you finished. Past leaderboards stay around: browse back to Sudayku #1 and your own time is still there.

MATCHES WITH FRIENDS Challenge a friend and play the same puzzle on a shared countdown. Not around? They play it later and you compare afterwards. Your statistics show your time next to theirs for every match.

YOUR PROGRESS A daily streak, a chart of your solving times, and the Sudayku index: one number that follows how you're playing right now, weighted by difficulty.

NO ACCOUNT, NO FUSS No email, no password, no ads, no trackers. Pick a name and play. Add friends with a code, a QR or straight from the leaderboard.