Google's AlphaGo defeats Go grandmaster Lee Sedol in final match

Hong Seok-Hyun (R), chairman of South Korea's Baduk Association, awards South Korean professional Go player Lee Sedol after Lee finished the final match of the GoogleDeepMind Challenge Match against Google's artificial intelligence program, AlphaGo, in Seoul, South Korea, March 15, 2016. Google's Go-playing computer program again defeated its human opponent in a final match on Tuesday that sealed its 4-1 victory. (Xinhua/Yao Qilin)