(테크놀로지) 바둑 도사 이세돌 3연패 후 마침내 알파고에게 1승을 거두다

출처: http://www.bbc.com/news/technology-35797102

Artificial intelligence: Go master Lee Se-dol wins against AlphaGo program

• 1 hour ago
 
• From the sectionTechnology

Image copyrightAP

Image captionLee Se-dol, right, reviews his win with other professional players

A master player of the game Go has won his first match against a Google computer program, after losing three in a row in a best-of-five competition. 바둑 도사 세 차례 패배 후 첫 승리 따내다.

Lee Se-dol, one of the world's top players, said his win against AlphaGo was "invaluable". 세계 최고수 중 하나인 이세돌은 알파고를 상대로 거둔 승리는 "매우 소중"하다고 했다.

The Chinese board game is considered to be a much more complex challenge for a computer than chess, and AlphaGo's wins were seen as a landmark moment for artificial intelligence.

A fifth game will be played on Tuesday.

Image copyrightReuters

Image captionMr Lee is one of the game's greatest modern players

Go is a game of two players who take turns putting black or white stones on a 19-by-19 grid. Players win by surrounding their opponents pieces with their own.

Commentator Michael Redmond said AlphaGo had been playing well up until the middle of the same, but at move 78, Mr Lee played brilliantly.

Speaking after his victory, Mr Lee said: "I've never been congratulated so much because I've won one game."

Google representatives said the defeat was "very valuable" for AlphaGo, as it identified a problem which they could now try to fix. (밝은 하늘: 이 점이 알파고가 이세돌과의 경기에서 노리는 점들 가운데 하나다.)

Image copyrightOther

Image captionDeepMind chief executive Demis Hassabis reacts to the news

In the first game of the series, AlphaGo triumphed by a very narrow margin - Mr Lee had led for most of the match, but AlphaGo managed to build up a strong lead in its closing stages.

After losing the second match to Deep Mind, Lee Se-dol said he was "speechless" adding that the AlphaGo machine played a "nearly perfect game".

In the third game commentators said that Lee Se-dol had brought his "top game" but that AlphaGo had won "in great style".

The AlphaGo system was developed by British computer company DeepMind which was bought by Google in 2014.

It has built up its expertise by studying older games and teasing out patterns of play.

DeepMind chief executive Demis Hassabis said AlphaGo "played itself, different versions of itself, millions and millions of times and each time got incrementally slightly better".

"It learns from its mistakes," he told the BBC.

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What is Go?

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Media captionA brief guide to Go

Go is thought to date back to several thousand years ago in China.

Using black-and-white stones on a grid, players gain the upper hand by surrounding their opponents pieces with their own.

The rules are simpler than those of chess, but a player typically has a choice of 200 moves, compared with about 20 in chess - there are more possible positions in Go than atoms in the universe, according to DeepMind's team.

It can be very difficult to determine who is winning, and many of the top human players rely on instinct.