On March 10, 2016, one of the strongest Go players in the world, Lee Sedol, stared at one of the oddest moves in the history of professional Go. His opponent -- the computer program AlphaGo, from Google-owned DeepMind -- had, in the 37th move of the game, placed its stone in what the Go community calls a "shoulder hit"; a move professional Go players seldom use. Stunned, Lee just walked out of the room. AlphaGo appeared to demonstrate creative initiative exceeding the best human players. Lee returned a few moments later and played a brilliant game, though he still conceded defeat after 211 moves.