How to Play Sudoku
Fill the grid so every row, every column and every box contains each number exactly once (1 to 4 in Kids mode, 1 to 9 in 9x9). Some numbers are given; you work out the rest.
Play Sudoku nowSudoku is a number puzzle that uses logic, not maths. Start with the 4x4 Kids mode and work up to Hard 9x9.
What is Sudoku?
Fill the grid so every row, every column and every box contains each number exactly once (1 to 4 in Kids mode, 1 to 9 in 9x9). Some numbers are given; you work out the rest.
How to play Sudoku
Tap a square, then tap a number on the pad (or type it). Use the eraser to clear and Hint for help. Arrow keys move around on a keyboard.
Step by step
- Pick a level.
- Choose an empty square.
- Check which numbers are already in its row, column and box.
- Place the only number that fits.
- Repeat until the grid is full.
Strategy tips to play better
- Look for a square where only one number is possible.
- Pick a number and find the only square in a box where it can go.
- Fill the most complete rows, columns and boxes first.
- Red numbers break a rule; fix them straight away.
What kids learn
- Logic
- Concentration
- Patience
- Number recognition
For parents and teachers
The 4x4 mode suits ages 5 to 7; 9x9 Easy works from about age 8.
- ✅ Free to play
- 🕹️ No downloads or installs
- 📱 Works on mobile and desktop
- 🔒 No login or registration
Tips & Tricks
Beginner
Start with Kids 4x4 to learn the rules.
Pro
Solve Hard puzzles without using Hint.
Educational Importance
Sudoku trains deductive reasoning: using clues to rule out possibilities until only one answer is left.
Practical Applications
Ideas:
| Use Case | Description |
|---|---|
| Morning work | One puzzle to start the day. |
| Logic club | Race to solve the same level. |
| Quiet time | A calm solo activity. |
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