AlphaGo wins second game against Go champion - video

Google's AlphaGo defeats world Go champion Lee Sedol for a second time on Thursday, putting owners of the machine only one victory away from the $1m [700,000] prize. Sedol says the match was a 'complete loss' for him and that AlphaGo was in control of the game from the first move. The five-game series is scheduled to run until Tuesday

• Google's AlphaGo wins second game against Go champion