3		2	1		4		9	6
8	4		6				5
				7				3
5							2	9
		9				3
2	7							4
7				2
	2				5		4	7
1	6		7		8	5		2

1	2	3
4	5	6
7	8	9
backspace	school	emoji_objects

New game Easy Medium Hard Expert

1	2	3	4	5	6	7	8	9
backspace	school	emoji_objects	New game Easy Medium Hard Expert

Play Sudoku online

Sudoku is the most popular number puzzle game in history, with millions of people worldwide playing the game. Our website lets you play an unlimited number of Sudoku games at multiple difficulty levels. Our automatic trainer can help you improve your skills by giving you hints while you play using various strategies. Try it out to see for yourself how quickly you will get better at playing the game!

How to play Sudoku

Sudoku is a number puzzle game having the objective of filling a 9x9 grid with the digits from 1 to 9. The grid must be filled in such a way that each column, each row, and each of the nine 3x3 smaller squares contain all of the digits from 1 to 9 once each.

For example, the following board has the first row, the first column and the top-left square fully filled in:

3	1	2	4	8	9	7	5	6
8	4	7
6	9	5
5
4
2
7
9
1

Benefits of playing Sudoku

To solve a Sudoku puzzle, you use basic logic actions that stimulate your concentration, attention and memory skills. Playing the game is surely a lot of fun, but it is also exercising your brain extensivly. Many users report amazing benefical effects on the brain:

• Sudoku improves your memory. Memory and logic are the most exercised cognitive skills while playing the game. As players get better at the game, they learn how to keep track of increasingly more numbers and their positions on the board. Effectively, they are improving their working memory capacity.
• Sudoku increases your concentration and patience. Filling in the board requires systematical decisions based on careful reasoning. While not mathematically hard, this involves a lot of focus and patience. Players who keep practicing get better at staying focused over increasingly longer periods of time.
• Sudoku boosts your brain. Studies have shown that intensive games that stimulate working memory and reasoning skills help you boost your brain power and reduce the chances of developing cognitive decline.
• Sudoku helps you relax and makes you happy. Playing a game only takes a few minutes, which makes it ideal for breaks. As the game requires focus, it helps you take your mind off other things. On top of that, solving a tricky game can be very satisfying!

Sudoku strategies

The rules of Sudoku are so simple that it is easy to just start playing the game without having to learn any strategies. As you keep playing, you will naturally get better at noticing patterns in the game, and most likely discover by yourself various strategies to solve it faster and faster.

Our trainer mode will help you spot such patterns. It will not give you the solution right away—just some hints to help you figure out what to look at on the board and understand why. You can think of it as a virtual companion guiding you through the game.

As you keep practicing, you will get better at finding patterns by yourself, and find that you can solve games quickly by your own without the trainer. To turn the trainer on/off, click the school button. Try out the trainer now!