Sudoku

About Sudoku

This classic Sudoku suits everyone from beginners to advanced players. Choose Easy mode if you want to relax and train your brain, or try the Hard, Very Hard and Insane modes if you want a serious challenge.

Sudoku uses numbers, but it needs no maths at all. It is pure logic, and every puzzle can be solved without guessing. That is why so many people use it as a daily habit to keep their mind sharp.

How to play

1. Pick the difficulty level you prefer.
2. Fill in the empty cells with the numbers 1 to 9.
3. Each number can appear only once in every row, every column and every 3×3 box.
4. Finish the grid to complete the puzzle.

These are the usual rules. If the game shows you something different on screen, follow the game.

Tips

• Start with the rows, columns and boxes that are nearly full.
• Look for a number that can only go in one place within a box.
• Keep track of possible numbers instead of guessing.
• If you get stuck, move to a different box and come back with fresh eyes.

Want to go deeper? Read our guide: Sudoku Tips for Beginners: How to Solve Any Puzzle Without Guessing.

Questions about Sudoku

Do you need to be good at maths for Sudoku?

No. Sudoku uses numbers as symbols, and there is no adding up. It only takes logic.

What are the difficulty levels?

You can choose from Easy, Hard, Very Hard and Insane.