How to Play Sudoku Online
Press “Play” to begin a new game. Select your level: beginner (Sudoku easy), intermediate or advanced (Sudoku hard).
Fill in the blanks with numbers from 1 to 9. Your aim is to fill the Sudoku with the numbers 1 through 9 so that each number occurs only once in every line, column, and 3×3 block on the Sudoku board. Use the number buttons to fill the blanks. Select “?” for help/reminder.
Behind the settings button (cogwheel icon) you will find some helpful functions, including hints, notes, play without a timer, etc. There is also a Sudoku solver button if you give up.
This mini-game is suited for mobile, PC, and tablet. No flash player is needed. No installation or registration. Enjoy!