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Sudoku
BRAIN★ HT ORIGINAL🏆 LEADERBOARD ENABLED

Sudoku

Daily Sudoku — 3 difficulties, notes, hints

🎮 Free Play⚡ Instant Load📱 Mobile Ready🚫 No Signup
Direct link to fullscreen mode →

About Sudoku

Sudoku on HT Hub features a working backtracking generator producing unique-solution puzzles across three difficulties (40 clues easy, 30 normal, 24 hard). Daily mode is seeded by today's date so all players get the same puzzle. UI: 9×9 grid with thicker 3×3 box borders, number pad below, notes mode for pencil-marks, 3 hints per game, mistake counter (3 strikes or 1 in hardcore mode). Row/column/box glow on completion. Per-difficulty best times and history saved locally. Mobile-first taps + keyboard 1-9 on desktop.

How to play Sudoku

  1. 1

    Open Sudoku

    Click "Play Now" on this page to launch Sudoku in your browser.

  2. 2

    Use the controls

    Tap a cell + number pad to fill. N toggles notes mode. U undoes. H hints. Keyboard 1-9 + arrows on desktop.

  3. 3

    Improve your score

    Each run is tracked. Sign in to save your best scores to the public HT Hub leaderboard and try to climb the global rankings.

Frequently asked questions about Sudoku

Is Sudoku free to play?

Yes. Sudoku is completely free to play in your browser on HT Hub. No download, no installation, no paywalls, and no signup required to start playing.

Can I play Sudoku on mobile?

Yes. Sudoku is mobile-optimized and works on iOS Safari, Android Chrome, and all modern mobile browsers with touch controls.

What are the controls for Sudoku?

Tap a cell + number pad to fill. N toggles notes mode. U undoes. H hints. Keyboard 1-9 + arrows on desktop.

Do I need an account to play Sudoku?

No account required to play Sudoku. Sign in with email or Google (optional) to save your high scores to the public HT Hub leaderboard and sync progress across devices.

Is Sudoku safe to play in my browser?

Yes. Sudoku is built and hosted by HT Hub — it runs in your browser with no installation, no permissions, no tracking beyond standard analytics, and no third-party redirects.

How does the Sudoku leaderboard work?

Your high score for Sudoku saves to a public global leaderboard on HT Hub. Sign in with email or Google to claim your name on the rankings — guest scores are recorded anonymously.

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