Sudoku is a logic puzzle that’s easy to learn and deeply satisfying to master. Whether you’re completely new or just want a refresher, this guide will show you how to play Sudoku step by step.
Once you understand the basics, you can jump straight into a free puzzle on Awesome Sudoku and start playing right away.
The goal of Sudoku is simple: fill the grid so that every number from 1 to 9 appears exactly once in each row, each column, and each 3×3 box.
There’s only one correct solution for each puzzle, and you never need to guess — every move can be solved using logic.
A standard Sudoku puzzle consists of a 9×9 grid, divided into nine smaller 3×3 boxes. Some numbers are already filled in to get you started.
Your job is to fill in the empty cells while following the Sudoku rules.
Whenever you place a number in a cell, you need to check three things.
The number must not already appear in the same row.
The number must not already appear in the same column.
The number must not already appear in the surrounding 3×3 box.
If a number passes all three checks, it’s a valid move.
If you’re new to Sudoku, it’s best to start with an Easy puzzle.
Begin by scanning the grid for rows, columns, or boxes that are almost complete. Look for places where only one number can possibly fit and fill in the obvious answers first.
Sudoku rewards patience — slow and steady progress is how puzzles are solved.
Sometimes a cell could hold more than one number. That’s where notes come in.
Notes allow you to keep track of possible numbers for a cell, eliminate options as the puzzle becomes clearer, and avoid random guessing.
As you place more numbers on the board, your notes will naturally narrow down until the correct choice becomes obvious.
Awesome Sudoku includes several optional features designed to make the game clearer and more enjoyable.
Selecting a cell highlights its row, column, and box, making it easier to spot conflicts.
When you select a cell, all matching numbers across the grid are highlighted, helping you quickly see patterns.
Use notes to add and remove possible numbers as you work through the puzzle.
Track how long you take to complete a puzzle, or simply play at your own pace.
If you’re unsure about a move, you can check whether a specific cell is correct without revealing the full solution.
All of these tools are optional — use as much or as little help as you like.
You’ve solved the Sudoku puzzle when all cells are filled and every row, column, and 3×3 box contains the numbers 1 through 9 exactly once.
No duplicates, no blanks — just a complete grid.
If you’re stuck, you might be guessing instead of using logic, forgetting to check the 3×3 box, or ignoring notes you’ve already ruled out.
Taking a short break can also help — fresh eyes often spot what you missed.
The best way to learn Sudoku is by playing.
Start with an Easy puzzle, take your time, and enjoy the process. As you improve, you can move on to Medium, Hard, and Expert puzzles whenever you’re ready.
Once you’re comfortable with the basics, check out our Sudoku tips and strategies to learn how to solve puzzles faster and tackle harder difficulties.
Play free Sudoku online now on Awesome Sudoku.