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What Is Sudoku? 🧠

Sudoku is a classic logic-based number puzzle that has captured the minds of millions across the world. Whether you're on a plane, at a café, or relaxing at home, chances are you've seen someone filling in a Sudoku grid.

The best part? No math skills required — just pure logic.

🎯 The Goal

In a standard 9x9 Sudoku puzzle, your mission is to fill every empty cell with a number from 1 to 9 — but there's a catch:

Every row must have each number from 1 to 9 once.
Every column must have each number from 1 to 9 once.
Each 3x3 square (also called a box) must also contain numbers 1 to 9 once.

Sound simple? It starts easy — but puzzles range from easy to extreme difficulty.

🖼️ A Visual Example

Here's what a Sudoku puzzle looks like:

A sample Sudoku puzzle with some numbers filled in

You can print this out or play a similar puzzle digitally on our website!

🕹️ How Do You Play?

Look at the numbers already filled in.
Use logic to figure out where other numbers should go.
Fill in one cell at a time, checking that you're not breaking any rules.

There’s no guessing involved in a well-designed Sudoku — everything can be solved through deduction.

🧩 Why Sudoku Is Great for You

✅ Improves logical thinking
✅ Boosts concentration
✅ Offers screen-free entertainment
✅ Easy to pick up, hard to master

📱 Try Sudoku Now — Free

At Sudoku.ph, you can play Sudoku for free on any device. We offer multiple difficulty levels, daily challenges and player stats, and soon leaderboards!

💡 Quick Tip for Beginners

Start with the easiest level and look for numbers that are nearly complete. Fill in the obvious ones first — you'll be surprised how quickly the puzzle opens up.