AlphaGo victory: what does it mean for the future of AI? – video explainer

Google's supercomputer AlphaGo defeated world Go champion Lee Sedol 4-1 on Tuesday, in what has been described as a landmark achievement for an artificial program. According to Demis Hassabis, Google DeepMind co-founder, AlphaGo improved its game by playing against itself millions of times. Have humans taken the 2,500-year-old game as far as they can?

• AlphaGo: its creator on the computer that learns by thinking