# How to Play Sudoku: A Beginner's Guide to Rules and Strategy

**Quick answer:** Sudoku is a logic puzzle played on a 9x9 grid. You fill every empty cell so that each row, each column, and each 3x3 box contains the numbers 1 to 9 exactly once. No math is required — only logic and deduction.

Despite using numbers, Sudoku never asks you to add or multiply anything. All you need is logic, patience, and a calm state of mind.

## What are the rules of Sudoku?

A standard classic Sudoku puzzle is a 9x9 grid divided into nine 3x3 sub-grids (called "blocks" or "boxes"). To solve it, you fill every empty cell while following three rules:

1. **Every row** must contain the numbers 1 through 9 exactly once.
2. **Every column** must contain the numbers 1 through 9 exactly once.
3. **Every 3x3 block** must contain the numbers 1 through 9 exactly once.

A number can never repeat within the same row, column, or block. That single constraint is the entire game.

## How do beginners solve a Sudoku puzzle?

The golden rule for beginners is simple: **don't guess.** Sudoku is about certainty. These two techniques will get you moving:

### Crosshatching

Pick a number (say 5) and scan the rows and columns to see where it *cannot* go inside a specific 3x3 block. Often you will find only one valid empty cell left — that is where the 5 belongs.

### Counting

If a row already has eight numbers filled in, count from 1 to 9 to find the missing digit. The same trick works for any column or block that is nearly complete.

## Why should you play Sudoku?

Beyond being a fun puzzle, Sudoku is a fantastic way to train your focus. In a world full of noise and distraction, sitting down with a beautifully designed, tactile grid can become a daily sanctuary. Many players find it as calming as a few minutes of meditation.

Ready to test your new knowledge? Play a free puzzle right now, then work your way up to [intermediate techniques like naked pairs](/guides/intermediate-sudoku-strategies).