Sudoku Classic
Solve endless Sudoku boards with three difficulty levels. Fill every row, column, and 3×3 box while avoiding mistakes and chaining levels for bigger scores.
Strategy
Sudoku Classic
🔢 Sudoku Classic
Solve endless Sudoku boards with three difficulty levels. Fill every row, column, and 3×3 box while avoiding mistakes and chaining levels for bigger scores.
📖 How to Play
Select an empty cell, then tap numbers 1-9 to place a value. Correct entries give points, mistakes cost lives. Reach 3 mistakes and the run ends. Clear boards quickly for time bonus and continue to the next puzzle.
About this game
Why play Sudoku Classic online?
Sudoku Classic is a free strategy game that runs in your browser. No download, no account — just open it and play on phone or desktop.
Quick tips for better runs
- Play one short practice round first so the controls feel automatic.
- Use fullscreen when you want cleaner focus and fewer accidental scrolls.
- After a run ends, try a related game in the same style instead of leaving the site.
Good session fit
Sudoku Classic works well as a quick browser session. When you are done, jump into a similar free game from the same category.
⭐ Features
- ✓ 100% free — no purchases, no paywalls
- ✓ Plays directly in your browser — no download required
- ✓ Works on desktop, tablet, and mobile
- ✓ Smooth 60fps HTML5 Canvas gameplay
- ✓ Your high scores are saved locally
- ✓ No registration or account needed
❓ Frequently Asked Questions
How does scoring work in Sudoku Classic?
Each correct number placement earns points. Completing a full board gives a time bonus based on how fast you solved it. Chain multiple boards in a row for increasing score multipliers.
What happens when I make a mistake?
You have 3 lives per run. Each incorrect number costs one life. After 3 mistakes, the game ends. Correct placements are locked in permanently.
What difficulty levels are available in Sudoku?
Three levels: Easy (many given numbers), Medium (balanced challenge), and Hard (minimal clues). Each completed board advances to the next puzzle at the same difficulty.