Four takeaways from AlphaGo's victory over a world champion Go player

South Korean Go player Lee Sedol reviews the match after finishing the Google DeepMind Challenge Match against Google's artificial intelligence program, AlphaGo, in Seoul, South Korea, on March 15, 2016. Google's Go-playing computer program defeated its human opponent in a 4:1 victory. South Korean Go player Lee Sedol reviews the match after finishing the Google DeepMind Challenge Match against Google's artificial intelligence program, AlphaGo, in Seoul, South Korea, on March 15, 2016. Google's Go-playing computer program defeated its human opponent in a 4:1 victory. South Korean Go player Lee Sedol reviews the match after finishing the Google DeepMind Challenge Match against Google's artificial intelligence program, AlphaGo, in Seoul, South Korea, on March 15, 2016.