Review of Game 5 of the Artificial Intelligence Match of the 21st Century: AlphaGo unfamiliar with common tesuji in ultimate moyo game • /r/MachineLearning

This review of the fifth and last game of the Google DeepMind challenging match between deep learning AlphaGo and top Go-prof Lee Sedol (9p) is a highlighting game commentary and analysis including short explanations and discussions of the most important moves and positions, many diagrams, images of the match, and very brief commentaries by top Go-profs and Lee Sedol himself. Lee Sedol avoids that AlphaGo will foreclose the bottom right corner and extends his corner (Dia. AlphaGo calculates that it's three stones have enough aji to make a fight meaningful. The program apparently is unfamiliar with a common tesuji (also known as the'tombstone squeeze'; where you offer two stones, subsequently throw in another one, in order to rob the opponent efficiently from the inner liberties). At this point in the game, Demis Hassabis tweeted: "AlphaGo made a bad mistake early in the game (it didn't know a known tesuji) but now it is trying hard to claw it back... nail-biting".