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Here's the post-game conference livestream:

https://www.youtube.com/watch?v=yCALyQRN3hw

At the end, Lee asked to play white in the last match, and the Deepmind guys agreed. He feels that AlphaGo is stronger as white, so he views it as more worthwhile to play as black and beat AlphaGo.

Conference over, see you all tomorrow.

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Lee asked to be black, because there's 7.5 points advantage for the white who follows the black, and Lee won as a white this time.

Given that Lee was black in games one (due to luck of the draw) and three I expected he would be in game five as well. Perhaps the system permits loser to choose?

normally the color of the 5th game is chosen by the result of the 4th game, but Lee asked to change that rule and make him black, so he can have a shot at beating AlphaGo as black.

Are you sure? I thought I heard the commentators saying that it was randomized again for game 5, but maybe I was mistaken?

Is there a source of the rules for colour choice? I had thought it would be another nigiri as in 1st game. Choosing it based on the 4th game's result would imply Lee Sedol would have been given white. Since he won with white, isn't it an unfair advantage in general? For instance, if it were 2-2 after the 4th game.

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