Achievement Unlocked: Google AlphaGo A.I. Wins Go Series, 4-1

South Korean professional Go player Lee Sedol reviews the match with other professional Go players after the fourth match against Google's artificial intelligence program, AlphaGo. South Korean professional Go player Lee Sedol reviews the match with other professional Go players after the fourth match against Google's artificial intelligence program, AlphaGo. The five-game clash pitting man against machine is over, with Google's artificial intelligence program winning the series.The program -- called AlphaGo -- took four of five games against Korean Lee Sedol, an 18-time world champion of the board game Go. "I feel a little regrettable because I believe that there is more that a human being could have shown in a match against artificial intelligence," Lee said following the final match. The matchup had all the mood and atmosphere of a prize fight. And play-by-play announcers who analyzed every move.