2016.

According to Baidu Education Information, in (), AlphaGo defeated the world Go champion Lee Sedol. A. 2006, B. 2012, C. 2016, D. 2017. The correct answer is C, 2016. Analysis: In March 2016, Alpha Go competed with Go world champion and professional 9-dan Go player Lee Sedol in a Go human-machine battle and won with a total score of 4 to 1; at the end of 2016 and early 2017, the program was listed as "Master" on the Chinese chess website "(Master) registered an account to play fast chess duels with dozens of Go masters from China, Japan and South Korea, without losing a single game for 60 consecutive games; in May 2017, at the Wuzhen Go Summit in China, it competed with the world's No. 1 World Go Champion Ke Jie played against each other and won with a total score of 3-0. It is recognized in the Go community that Alpha Go's chess prowess has exceeded the top level of human professional Go.

AlphaGo is the first artificial intelligence robot to defeat a human professional Go player and the first to defeat a world Go champion. It is led by Demis Hassabis of DeepMind, a subsidiary of Google. team development. Its main working principle is "deep learning".