South Korean Lee Sedol, the world champion of the ancient Chinese board game Go, started the third of a historic five-game Go match with Google's computer program AlphaGo after his successive losses in the first two games.
Lee and AlphaGo launched the third game at 1 p.m. local time (0400 GMT) at Four Seasons hotel in Seoul.
Playing Black, Lee put his starter at the upper-right flower spot, placing his next marker at a position right beside the upper-left flower.
AlphaGo started off the game, with the first two white stones placed both on flower spots, a strategy seen in the first match.
The human champion entered into an aggressive battle from the very beginning to dominate the game in the first half.
Following his second defeat, Lee told a press conference on Thursday that his winning possibility would likely rise if he gets dominant in the first half.
The 33-year-old allegedly analyzed AlphaGo's strategy all night together with other South Korean Go professionals before reaching a conclusion that he can win only when he dominates in an early phase.
