Rules of the Game
The SuDoku game board consists of 9x9 squares. The objective of the game is to fill all the squares with a number between 1 and 9. Each number may occur only once on every row, on every column, and in every smaller 3x3 square into which the game board is divided.
You can play Sudoku online by filling in the missing number on the board on the left-hand side. Simply click on the square you want to fill, and type in the correct number. If you type in an offending number that already occurs in that row, column or box, it will be colored red. Or you can download a PDF version and play it on paper
New Game ( very easy, easy, medium, hard, fiendish )
Difficulty level: hard