Free Sudoku puzzles online
We encourage you to play classic sudoku and samurai sudoku.
We have prepared for you the opportunity to play training game
and also participate in ranked sudoku games.
Classic sudoku
A classic Sudoku board consisting of 81 cells that need to be filled with digits from 1 to 9 according to specific rules. To start playing, select your preferred challenge level on the gradient difficulty scale below and click the “start game” button.
Training game (not for points)
Ranked game (play for points)
Fortunately signing up takes only few seconds :)
Samurai sudoku
A version for more experienced players. Five interconnected classic Sudoku boards in one game. To start playing, select your preferred challenge level on the gradient difficulty scale below and click the “start game” button.
Training game (not for points)
Ranked game (play for points)
Fortunately signing up takes only few seconds :)
We’ve prepared 17,075,247 unique Sudoku boards for you. To make gameplay easier, we’ve divided them into 9 difficulty levels using a gradient scale. Green represents the easiest level, and the warmer the color, the harder the puzzle! Just starting your Sudoku journey? Try the extremely simple level, and once you get hooked, move on to very simple and simple. Already have some experience? Test your skills on the average, quite difficult, or difficult levels. Aiming to become a Sudoku master? Challenge yourself with the very difficult and extremely difficult levels. And if you think nothing can stop you — take on the impossible level!
Learn more about each difficulty level:
Sudoku Puzzles For Beginners Medium Sudoku Puzzles Very Hard Sudoku Puzzles
Very Easy Sudoku Puzzles Quite Difficult Sudoku Puzzles Extremely Sudoku Puzzles
Easy Sudoku Puzzles Hard Sudoku Puzzles Expert Sudoku Puzzles
What is Sudoku?
Sudoku is a puzzle that involves typing numbers in the right places on the board based solely on simple logical reasoning, and the only rule of the game is the principle that each of these numbers can appear only once per row, column and a group of cells. The appearance of the board depends on the variant of the game. In the classic version of Sudoku, the board is a square covered with a 9 x 9 grid composed of smaller 3 x 3 boxes (groups of cells), and the game consists in filling the cells with numbers from 1 to 9. If you do not know how to play Sudoku, read the rules and guidelines which will help you quickly solve your first puzzles.History of Sudoku
The origin of the name of this puzzle is the result of the popularity it gained in Japan, but its origin is quite different. The origins of the game go back as far as Euler's Latin squares from 1780, and the modern Sudoku board appeared for the first time in 1979 under the name of "Number Place" in the American magazine Dell Magazines. Shortly thereafter, the Japanese reprinted the game giving it the name of Sudoku. The Japanese name is written with the following symbols 数 独. The first symbol (i.e. kanji) is translated as number, and is pronounced: su. The second kanji means sole, single, and is pronounced: doku. Thus, the whole word means "single number", which captures the essence of the game.How ranking is created?
Join the global Sudoku player community. Register your player account and have fun competing with other players in monthly rankings. Doing that may give you the opportunity to appear in the overall ranking! Rules are simple. For every solved Sudoku board you'll get from 1 to 150 points (it depends on the type and difficulty level of the chosen game).
Did you know that...
The originator of Sudoku was Howard Garns, an architect from the USA. In 1979, he sent the puzzle he created to a magazine with mathematical riddles.
MySudoku.com is one of the largest websites dedicated to Sudoku. It contains more than 17 million boards of this game!
In 2008 a lawsuit against a drug cartel was dismissed after it was discovered that the jury members were solving Sudoku at the meetings. You can learn more about it in a Telegraph article.
The numbers in Sudoku are just symbols that can be replaced with colours, shapes or letters because it is a puzzle game. It does not require arithmetic calculations.
What are the benefits of solving Sudoku?
🧠 For your mind:
1. Improves concentration – requires focus on placing numbers and recognizing patterns.
2. Develops logical thinking – Sudoku is a purely logic-based game, with no guessing needed.
3. Trains working memory – you need to remember possible numbers for multiple cells.
4. Teaches patience and perseverance – harder levels demand careful analysis and methodical strategy.
⏳ For daily life:
5. Helps reduce stress – it engages your mind and offers a break from everyday worries.
6. Enhances organization and planning – promotes a systematic approach to problem-solving.
7. Doesn’t require much time – enjoy a quick mental workout even in just a few spare minutes.
👵 For brain health:
8. May slow down cognitive aging – research suggests that playing Sudoku regularly helps maintain mental sharpness with age.
9. Lowers the risk of neurodegenerative diseases – mentally stimulating activities like Sudoku may help prevent Alzheimer’s, as supported by studies published in Neurology.