Computer says Go

IN 1996 IBM challenged Garry Kasparov to a game of chess against one of its computers, Deep Blue. Mr Kasparov, regarded as one of the best-ever players, won—but Deep Blue won the rematch. Two decades on, computers are much better than humans at chess but remain amateurs when it comes to the much tougher, ancient game of Go. Or at least, they did. Now a computer has managed to thrash a top-drawer human player. The computer used a program, called AlphaGo, developed by DeepMind, a London-based artificial intelligence (AI) company bought by Google in 2014 for $400m. It took on Fan Hui, European Go champion , beating him 5-0, according to a report of the contest in Nature. Beating a champion at Go has long been considered a “grand challenge”…


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