Lets face it, the most important computer you own, and which REALLY needs to be tested regularly, is your brain...
Su Doku is a numerological puzzle using a 9x9 board.
The object is to place the numbers 1 - 9 in all rows and columns, and additionally into the 3x3 boxes the board is divided into.
Check the link for daily puzzles...
Do you know of other puzzles?
Post them in this thread....