Sudoku is a addictive puzzle game which became popular in Europe just a few years ago. The goal is to fill the nine 3×3 grids with the numbers of 1 to 9 each and exclusively for the whole row and column. The concept itself is pretty simple but there are various difficulty levels that make it quite a challenge.
Web Sudoku
If you are into games Sudoku might be worth a try. You probably have not heard about it so here is an explanation of Sudoku: Each Sudoku has a unique solution that can be reached logically without guessing. A game consists of a big 9×9 square that is divided into 9 3×3 squares. Every row and every column must have every number from 1 to 9 listed once as must every 3×3 square.
