“Far from being a step towards machine intelligence, as theorists had hoped in the 1950s, building a world-class chess computer has proved to be surprisingly easy, thanks to the plummeting price and soaring power of computer chips. Rather than emulating the complex thought-processes of human players, computers simply resort to mindless number-crunching to decide what move to make. Throw enough microchips at the problem—Deep Blue contained hundreds of specialist chess-analysis chips—and it does indeed become trivial. Quantity, as Gary Kasparov noted after his defeat, had become quality. He demanded a rematch, but IBM said no.” Now he’s getting another chance.