
Chinese Go player Ke Jie competes during the second match against artificial intelligence program AlphaGo in Wuzhen, east China's Zhejiang province, May 25, 2017.(Xinhua/Xu Yu)

Chinese Go player Ke Jie competes during the second match against artificial intelligence program AlphaGo in Wuzhen, east China's Zhejiang province, May 25, 2017.(Xinhua/Xu Yu)