Chinese Go player Ke Jie, left, looks at the board as a person makes a move on behalf of Google's artificial intelligence program, AlphaGo, during a game of Go at the Future of Go Summit in Wuzhen in eastern China's Zhejiang Province, Tuesday, May 23, 2017. A computer that plays go has started a match against China's No. 1 player in a test of whether artificial intelligence can master one of the last games that machines have yet to dominate. (Chinatopix via AP) China's top player of the ancient board game of go began a second game against a computer Thursday in a competition authorities limited the Chinese public's ability to see.
Google's AlphaGo program defeated 19-year-old prodigy Ke Jie on Tuesday in the first of three games they are due to play this week at a forum on artificial intelligence in this town west of Shanghai.
Internet users outside China could watch the games live but Chinese censors blocked most mainland web users from seeing the Google website carrying the feed. None of China's dozens of video sites carried the live broadcasts but a recording of Tuesday's game was available Wednesday night on one of the most popular sites, Youku.com.
State media reports on the games have been brief, possibly reflecting Beijing's antipathy toward Google, which closed its China-based search engine in 2010 following a dispute over censorship and computer hacking.
The official response to the match, a major event for go and artificial intelligence, reflects the conflict between the ruling Communist Party's technology ambitions and its insistence on controlling what its public can see, hear and read.
The possible reason for suppressing coverage while allowing Google to organize the event was unclear. Censorship orders to Chinese media are officially secret and government officials refuse to confirm whether online material is blocked.
Machines have mastered most other games. They conquered chess in 1997 when IBM Corp.'s Deep Blue system defeated champion Garry Kasparov, but go was considered more challenging.
Players take turns putting white or black stones on a rectangular grid with 361 intersections, trying to capture territory and each other's pieces by surrounding them. The near-infinite number of possible positions requires intuition and flexibility that players had thought would take computers at a least another decade to master.
This week's games are taking place in a hall where Chinese leaders hold the annual World Internet Conference, an event attended by global internet companies.
Reports by Chinese newspapers and websites on AlphaGo's victory Tuesday were brief, despite Ke's post-game news conference being packed with scores of reporters. None mentioned Google.
Government TV in Zhejiang province, where Wuzhen is located, showed a 90-second report about Tuesday's match but few other broadcasters mentioned it, even though go has millions of fans in China and Ke is a celebrity.
Google says 60 million people in China watched online as AlphaGo played South Korea's go champion in March 2016.
The communist government encourages internet use for business and education but operates elaborate online monitoring and censorship.
Censors block access to social media and video-sharing websites such as Facebook and YouTube. Internet companies are required to employ teams of censors to watch social media and remove banned material.
China has the world's biggest population of internet users, with some 730 million people online by the end of last year, according to government data.
Web surfers can get around online filters using virtual private networks, but Beijing has cracked down on use of those.
Beijing's relationship with Google is especially prickly.
The company, headquartered in Mountain View, California, opened a China-based search site in 2006 and cooperated with official censorship. That prompted complaints from human rights and other activists and free press groups such as Reporters Without Borders.
In 2010, Google announced it no longer wanted to comply after hacking attacks on the company were traced to China.
The company shut down its China search engine and visitors were automatically transferred to another Google service in Hong Kong, but that stopped after Chinese authorities objected. Online filters slow access to the Hong Kong site enough to discourage many users.
Explore further: China blocks online broadcast of computer go match
More information: AlphaGo game live broadcast: events.google.com/alphago2017/