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Sudoku XP - Free Online Sudoku Game

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Download Sudoku XP for your PC

Introduction to Sudoku Puzzles

Sudoku, or Su Doku, is a fun and addictive Japanese puzzle game that has become a world-wide phenomenon, with thousands of puzzles available in books, newspapers, and even online.

Sudoku uses numbers, but no mathematics are needed, and that is why it is so popular.

If you are looking for free Sudoku games that you can play online, search no more. Our online Sudoku XP game generates thousands of Sudoku puzzles that can be played for free in your web browser. All you need to do is to learn the rules, have a bit of spare time, and start playing.

Sudoku puzzles are a fantastic way to stimulate the mind. Studies have shown that playing such games can improve your memory, relax and clear your mind, and even prevent brain illnesses such as Alzheimers! Therefore, many researchers recommend playing Sudoku as part of our regular daily activity.

How to play Sudoku Puzzles

Sudoku Puzzle Rules
Each Sudoku puzzle has a unique solution that can be reached logically without guessing. To play the game, you must enter digits from 1 to 9 into the blank spaces on the Sudoku puzzle board. Every 3x3 square must contain one of each digit, and every row and every column must also contain each digit only once. When the entire board is filled, and these conditions are met, the board is solved.

Sudoku Controls
Use the left mouse button to select numbers along the left edge of the game screen, or press the desired number on the keyword to activate it. Once a number is activated, you can place it on the Sudoku puzzle board by moving the cursor to the desired location and then pressing the left mouse button. You may also remove or replace numbers by pressing the left mouse button while the cursor is over the tile again.

Pencil Marks
Sudoku XP also allows you to enter pencil marks onto the Sudoku puzzle board. Pencil marks allow you to place multiple numbers into a single tile location, which is useful when you are still not sure of the exact number that should be entered for a particular tile. Use the right mouse button to enter/remove pencil marks, or click the TEST button located to the right of the Sudoku puzzle board to activate pencil marking mode and then use the left mouse button to insert the pencil marks. Pencil marking mode can be turned off by clicking on the PLACE button.

Sudoku Sounds
Sound effects in the online Sudoku XP puzzle game can be turned on or off by pressing the "Sound Off" button or by pressing the 'S' key on the keyboard.

Online Sudoku Puzzle Strategies
For some good tips and strategies on how to solve Sudoku puzzles, please visit the online Wikipedia entry for Sudoku.

If you enjoy this free online version of Sudoku, please download the full deluxe version of Sudoku XP for your PC. The full version features infinite undos, automarking and hints, and a highscore board!

Have fun!


This free Sudoku game requires Java to be played online. If you have problems starting the game please download the Java plug-in.

Share this Sudoku Puzzle Game

If you enjoy this Sudoku puzzle game, feel free to share it with your friends!

There are two ways you can share this game:

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