Gary Kasparov has been wanting a rematch againt Deep Blue ever since he lost in 1997. However, Deep Blue is no more since IBM had more important things to do than repeat a chess match. Instead Kasparov is playing against a program made by Chessbase, Deep Junior. Deep Junior is less powerful but more sophisticated than Deep Blue. It can only search through three million moves per second, as opposed to 200 million. But its creators say it makes smarter choices about which moves to investigate further, cutting down the enormous number of possible paths. Deep Junior is no Deep Blue. Deep Blue had no need to make 'smarter' choices about what moves to consider - it considered all of them for quite a few moves in advance. It may, or may not, give Kasparov a decent game. But if Kasparov wins it is a victory against a much weaker opponent than the machine that shocked the world in 1997.