Google's AI AlphaGo has done it again: it's defeated Ke Jie, the world's number one Go player, in the first game of a three-part match. AlphaGo shot to prominence a little over a year ago after beating Korean legend Lee Se-dol 4-1 in one of the most potent demonstrations of the power of artificial intelligence to date. And its defeat of Ke shows that it was only getting started.

"I think everyone recognizes that Ke Jie is the strongest human player," 9th-dan professional and commentator Michael Redmond said before the match. And despite defeat, Ke's strategy suggested that the 19-year-old Chinese prodigy has actually learned from AlphaGo's often unorthodox approach. "This is Master's move," said Redmond of one of Ke's earliest plays, referring to the pseudonym that AlphaGo used for a recent series of online matches in which it racked up a 60-game winning streak.