[4] DeepMind released a version of AlphaGo Master in December 2017 that serves as a teaching tool analyzing the win rates of 6,000 Go openings from 230,000 human games.
After winning its 59th game it was revealed in the chatroom that Master was controlled by Aja Huang of the DeepMind team.
[10] Master's adversaries included many world champions such as Ke Jie, Park Jeong-hwan, Yuta Iyama, Tuo Jiaxi, Mi Yuting, Shi Yue, Chen Yaoye, Li Qincheng, Gu Li, Chang Hao, Tang Weixing, Fan Tingyu, Zhou Ruiyang, Jiang Weijie, Chou Chun-hsun, Kim Ji-seok, Kang Dong-yun, Park Yeong-hun, and Won Seong-jin, and also included national champions or world championship runners-up such as Lian Xiao, Tan Xiao, Meng Tailing, Dang Yifei, Huang Yunsong, Yang Dingxin, Gu Zihao, Shin Jinseo, Cho Han-seung, and An Sungjoon.
Master offered to extend the byo-yomi to one minute when playing with Nie Weiping due to his old age.
Go experts were extremely impressed by Master's performance and by its non-human play style in its online games.
[20] On 20 January 2017, DeepMind team members Fan Hui[21] and Aja Huang[22] disclosed that Master's operator accidentally entered a move other than AlphaGo's choice in two situations during the online games.