When machines learn

Joachim Buhmann, Professor for Computer Science and Head of the Institute for Machine Learning at ETH Zurich, offers a more sober assessment of the situation: "The Go player's algorithm has, of course, set a milestone in machine learning, but it's a milestone in a very limited, artificial field," he says. Since the early days of computer science as a scientific discipline, one of the challenges against which it has been relatively easy to measure progress has been strategy games. It started with simple games such as Nine Men's Morris and Draughts. In 1997, IBM's computer Deep Blue beat the reigning chess world champion Garry Kasparov. Soon thereafter, programmers set their sights on the considerably more complex game Go as the next potential milestone.