How to Play Sudoku

Sudoku is a number puzzle based on logic. Your goal is to fill a 9x9 grid so that every row, column, and 3x3 box contains the digits 1 through 9, with no repeats.

1

Select a Cell

Click or tap any empty cell to select it. The cell and related cells will highlight.

2

Enter a Number

Use the number pad or your keyboard (1-9) to place a number. The game checks your answer right away.

3

Use Notes

Turn on Notes mode to add pencil marks. These help you keep track of possible numbers for each cell.

4

Solve the Puzzle

Fill every cell correctly to win. Try to finish with few mistakes and a fast time.

Game Features

5

Difficulty Levels

Five settings from Beginner to Expert, ranked by the techniques needed to solve them.

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Daily Challenges

Five fresh puzzles each day, one per difficulty level. Build your streak!

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Statistics

Track your games, win rate, best times, and more.

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Achievements

Earn badges as you hit milestones and master new skills.

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Undo & Notes

Take back any move and add pencil marks to track your options.

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Dark Mode

Switch to a dark theme that's easier on your eyes.

Frequently Asked Questions

Is MyFreeSudoku really free?

Yes. There's no account, no subscription, and no hidden fees. Just open the site and start playing.

How are difficulty levels determined?

Our puzzles are graded by the solving techniques they require, not just empty cell count. Beginner puzzles need only basic logic, while Expert puzzles demand advanced methods like X-Wing.

What happens if I make a mistake?

You get three mistakes per game. Wrong answers are marked and the cell shakes. If you're stuck, use a hint, though hints affect your final score.

Is my progress saved?

Yes. Your game, stats, achievements, and settings save automatically in your browser. Close the tab and pick up where you left off.

Can I play on my phone?

Yes. MyFreeSudoku works on phones, tablets, and computers. Add it to your home screen for quick access.

What are Daily Challenges?

Five new puzzles appear each day, one per difficulty level. Complete them to build your streak and unlock achievements. You can also revisit past puzzles from the calendar.

About Sudoku

Sudoku is one of the world's most popular puzzle games. Millions of people play it every day. The name comes from the Japanese phrase meaning "the digits must remain single." Though the modern game became popular in Japan during the 1980s, similar number puzzles date back centuries.

Playing Sudoku offers real mental benefits. It sharpens logical thinking, strengthens memory, and improves focus. Research suggests that puzzle-solving can help keep your mind active and support brain health over time.

MyFreeSudoku gives you a clean, distraction-free place to play. Our difficulty system is based on actual solving techniques, so you'll always face a fair challenge. Whether you're just starting out or looking for expert-level puzzles, you can grow your skills at your own pace.