Google’s AlphaGo AI Go player has defeated Ke Jie, Go world champion, in the opening match of a three game series that will include matches with Jie on Thursday and Saturday. The win was by a narrow margin, but AlphaGo has been programmed to ensure victory, not to run up the score or devastate its opponent, so the margin by which it wins isn’t necessarily a good indicator of how easy or hard it was for the computer player to win. ...