What AlphaGo's win could mean

It's easy to make too much or too little of an event that took place earlier this month. A computer program called AlphaGo played a five-game match of the Japanese board game of go against South Korean grandmaster Lee Sedol. AlphaGo won easily, 4 games to 1. It's been nearly two decades since the Deep Blue computer program beat Russian chess grandmaster Garry Kasparov in 1997 to claim superiority in that game. Go had been considered much more difficult for artificial intelligence (AI) to master (for one thing, chess is played on a board with an 8-by-8 grid producing 64 squares; the go grid is 19-by-19). AlphaGo succeeded by combining two powerful computational approaches.