AlphaGo is a narrow AI computer program developed by Alphabet Inc.'s Google DeepMind in London to play the board gameGo. In October 2015 it became the first Computer Go program to beat a human professional Go player without handicaps on a full-sized 19×19 board. In March 2016 it beat Lee Sedol in a five-game match the first time a computer Go program has beaten a 9-dan professional without handicaps. Although it lost to Lee Sedol in the fourth game Lee