The newest version of Rebel is challenging grandmaster and nearly world-champion Anand. Programs have ELO-ratings, much higher than most of us can even dream to get close to. Pixelpusher namely just makes a random legal move. Well, this is just my version 0.02 of a chess playing applet.
Related applets play chess variants, and they play it just as bad.
To tell the truth, I actually hope to make the program a little stronger, but have to work on that yet. This only works with Java enabled browsers. Above, you see an applet in working. It plays a game of chess against you. The rook moves automatically with it.