There is another thread discussing this but in that one it was not made clear that the winner won $1M. I assumed it was Google paying Lee $1M for the privilege of challenging him.

So who is putting up the money?

Place your bets!

Hajin Lee thinks it's 50/50. The fact that it's difficult to call is astonishing.
http://www.nature.com/news/go-players-r ... at-1.19255

I expect it's Google: if Lee wins he gets the money, if AlphaGo wins they give it to some charity. I also saw Deepmind will support the British Go Association (not a legal clarity).

The tournament will be livestreamed on DeepMind’s YouTube channel as well as broadcast on TV throughout Asia through Korea’s Baduk TV, as well as in China, Japan, and elsewhere. There will also be a daily summary, broadcast a while after the end of the game.

Match commentators will include Michael Redmond, the only professional Western Go player to achieve 9 dan status with 500 professional wins under his belt. Redmond will commentate in English, and Yoo Changhyuk professional 9 dan, Kim Sungryong professional 9 dan, Song Taegon professional 9 dan, and Lee Hyunwook professional 8 dan will commentate in Korean alternately.

A few more details and links:

“알파고에 대한 궁금증 때문에 이번 대결을 수락했는데, 결정하는 데 5분 정도밖에 걸리지 않았다”
(“I accepted this match out of curiosity about AlphaGo; it didn’t even take 5 minutes to make the decision.”)
“지난해 10월의 알파고 기보는 나와 그다지 승부를 논할 수준은 아니었다”
(“The AlphaGo game records from last October weren’t even at a level to discuss the possibility of winning against me.”)
“알파고가 계속 업데이트돼 기력이 향상되겠지만 시간적 한계가 있기 때문에 이번에는 내가 이길 것으로 본다”
(“As AlphaGo continues to get updated, it’s strength will certainly increase; but because of the time constraints, I’m looking forward to winning this time. ”)
"시간이 흘렀고 알파고의 실력이 늘었겠지만 3-2 이런 스코어가 아니라 내가 한판이라도 지느냐의 승부일 것이다"
("As time goes by, AlphaGo's strength will increase, but (this match) won't be a 3-2 score; it's more like, will I even lose a single game?")

If AlphaGo wins, the prize money will be donated to UNICEF, STEM and Go charities.

1st game;

AlphaGo defeated Lee Sedol by resign.

AlphaGo vs Lee Sedol 1:0

Damn, Lee was playing so well at the beginning.

I want AlphaGo to win, but still pretty shocked.