1. Monitor room with screen showing Chinese Go player Ke Jie in match against Google Alpha Go
2. Various of screen showing Ke Jie in match against Alpha Go
3. Various of referee declaring Alpha Go has won the first match
4. Screen showing result
5. Cutaway of cameramen
6. Ke Jie and Google executives at news conference
7. SOUNDBITE (Mandarin) Ke Jie, Chinese Go Player:
"I am actually not very happy with my performance today. I think I could have done a better job but Alpha Go is too powerful and I feel like I can't beat it no matter how hard I try. I have said this is the last time I play against artificial intelligence. Since this is the last time, I hope I can try my best and I will be happy with my performance (in the following two matches)."
8. Wide of news conference
9. SOUNDBITE (English) Demis Hassabis, CEO of Google DeepMind:
"For us, we want to use Alpha Go as I said as tool for the Go community to improve their knowledge about the game, so we hope to release some details about the architecture we are using, maybe also some of the games that Alpha Go plays against itself. So we will maybe make some announcements about this later in the week. But don't forget the reason ultimately we are developing these technologies is also to use them more widely in areas of science and medicine and to try and help human experts in those areas to make faster breakthroughs, so we have a lot of work ahead of us in the coming years."
10. Ke and Hassabis shaking hands after news conference
A computer defeated China's top player of the ancient board game go on Tuesday, earning praise that it might have finally surpassed human abilities in one of the last games machines have yet to dominate.
Google's AlphaGo won the first of three planned games this week against Ke Jie, a 19-year-old prodigy, in a town west of Shanghai.
The computer will also face other top-ranked Chinese players during the five-day event.
AlphaGo beat Ke by a half-point, "the closest margin possible," according to Demis Hassabis, founder of DeepMind, the Google-owned company in London that developed AlphaGo.
Go 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.
Competitors play until both agree there are no more places to put stones or one quits.
The game, which originated in China more than 25 centuries ago, has avoided mastery by computers even as they surpassed humans in most other games.
They conquered chess in 1997 when IBM Corp.'s Deep Blue system defeated champion Garry Kasparov.
Go, known as weiqi in China and baduk in Korea, is considered more challenging because the near-infinite number of possible positions requires intuition and flexibility.
Players had expected it to be at least another decade before computers could beat the best humans due to go's complexity and reliance on intuition, but AlphaGo surprised them in 2015 by beating a European champion.
Last year, it defeated South Korea's Lee Sedol.
Go is hugely popular in Asia, with tens of millions of players in China, Japan and the Koreas.
Google said a broadcast of Lee's 2016 match with AlphaGo was watched by an estimated 280 million people.
Players have said AlphaGo enjoys some advantages because it doesn't get tired or emotionally rattled, two critical aspects of the mentally intense game.