What is Sudoku?

Sudoku is a fun and addictive game that is turning fever all over the world. The goal of the game is to complete a grid (vertical columns and horizontal lines) by filling in the blanks with numbers from 1 to 9. The secret: the number cannot be repeated in the same column, row or block. Here's an example of Sudoku, with its solution:


Click here to download the Sudoku Solver, a software that solves the puzzle.