World-class Go player defeated by Google's AI; pledges to stick to human opponents

The program is designed to test the limits of computers in taking on humans at complex tasks and this victory over the world's top player - which many thought would take decades to achieve - comes after the AI program from Google's DeepMind unit bested a South Korean Go professional in a similar exhibition match last year. Go is a highly complex board game dating back thousands of years that involves two contestants placing black and white stones on a grid. It is popular in Asian countries and most top-ranked players hail from China, Japan and South Korea. Ke, the 19-year-old world number one, was visibly frustrated, tugging his hair and laying his head on the table during the final moments of the second match against AlphaGo on Thursday. "Last year, I think the way AlphaGo played was pretty close to human beings, but today I think he plays like the God of Go," Ke said after the game.