Numbers Are Evil

My uncle gave me an electronic sudoku game last Christmas. I found the actual thing kind of hard to work, but I got addicted to sudoku. For those of you who don't know, sudoku is a numeric puzzle with only one solution which can be reached logically without guessing. You enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3 square.

At this website, you can choose your level, be timed, and/or be notified when you enter a wrong number. I started playing and, as expected, was addicted for quite a few weeks, trying to constantly beat my own time. Give it a try. :)