Some interesting Sudoku facts:

You probably can see a lot more on Sudoku on the internet. I was introduced to the game in a funny manner. When I had called home
to speak to my parents, my mom suddenly said, " YOU are a mathematician. Teach us to play this game!"   
        
Ever since, my interest in the game has gone up. Keep watching this space for an article I am in the process of writing on Sudoku which
should look at a few non trivial mathematical aspects of the puzzle too.

If you wish to play the game, here is a nice place on the web. There are easier levels too.