Seoul – In the much-publicized battle between humans and computers in the game of Go, the Google software AlphaGo also won the second game, making it on the way to overall victory.
the South Korean top player Lee Sedol gave up after about four and a half hours on Thursday. Commentators had until recently spoken of a close game, but the computer conquered some more space on the board.
Lee had on Wednesday after the opening defeat in the Five-game match in Seoul surprised by the skill level of the software shown. The victory of the program to one of the world’s top Go player was seen as a milestone in the development of self-learning machines and artificial intelligence. Because Go with its many possible play down was to last as too complex for computers. The match is open until 15 March and will be shown live on the Google Video website YouTube.
The rules of the originally from China Go are simple in principle Two players try on a game board – a grid of 19 vertical and 19 horizontal lines – to conquer territories. But they take turns placing black and white stones. Completely encircled opponent’s pieces are removed from the board. but on the board with 361 fields a huge number of trains is possible, which makes it even for a powerful computer more difficult to ascribe the development of the game.
the second game was expected with additional interest because the software had the first train and thus could make the game. “AlphaGo presented pace and for Lee to win area”, professional players commented the prelude Michael Redmond in the YouTube broadcast. However, the software secured relatively quickly with a loose chain black stones the top of the board – which contributed in the end to decide. In the rest of the board is a dense tile unfolded on stone.
Then the machine made by approximately forty-five minutes a train staggered Redmond in great astonishment. To get something you really rarely seen, he said, as AlphaGo a stone diagonally placed on the still largely free right side of the board in addition to a free-standing white stone by Lee Se-dol. The train sends Koreans for more than a quarter of an hour to ponder and after that he spent his time much faster than AlphaGo. “It’s a tough game for Lee Se-dol. AlphaGo can not make him what he wants, “Redmond said after almost two hours of play. Lee distributed several strong groups of his pieces on the board, trying thus to build up pressure.
As in the first game said experts until the end of a narrow balanced game. As the software still had an hour left on the clock left, Lee remained around 30 minutes. Lee spent his two hours the first and had access to the additional quota, in which a player repeatedly has only one minute per train. He tried to the end, abzuknapsen by creative positioning of individual stones parts of occupied AlphaGo area – but in the end it was not enough. The YouTube commentators spoke of a “dramatic end of a dramatic game”.
AlphaGo was developed by the British company Deep Mind, which Google bought two years ago , according to media reports for $ 500 million. Cofounder Demis Hassabis wrote in Twitter, the second win is hard to grasp for himself. “AlphaGo has not played this game some wonderful creative traits.” In the software Although millions trains of the best human players were initially programmed – but they can even do so. Hassabis often speaks of teaching computers to think.
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