The Sadness and Beauty of Watching Google's AI Play Go

At first, Fan Hui thought the move was rather odd. But then he saw its beauty. I've never seen a human play this move," he says. It's a word he keeps repeating. The move in question was the 37th in the second game of the historic Go match between Lee Sedol, one of the world's top players, and AlphaGo, an artificially intelligent computing system built by researchers at Google.