Google's Go-playing machine has scored a second victory against the best human player.
The Thursday's victory by AlphaGo against South Korea's Lee Sedol, the winner of 18 world championships, puts the machine's owners one victory away claiming the $1 million prize.
AlphaGo's first win against Lee, on Tuesday, shook the Go-playing world, marking a milestone in the development of artificial intelligence.
Many believed it would take another decade for computers to conquer the ancient Chinese board game, one of the most creative games ever devised.
After his first loss, Lee said he was in shock as he never expected to lose. Google's team compared AlphaGo's win to landing on the moon.
Three remaining games run until Tuesday.
