The news that Lee Se-dol is bowing out comes three years after he lost in a closely watched series against Google’s AlphaGo in 2016.
Lee managed to win one game out of five against Google’s computer program — the only time it has been beaten in competition — but was ultimately defeated. Since then, AlphaGo has become even more advanced, beating other top players around the world.
“With the debut of AI in Go games, I’ve realized that I’m not at the top, even if I become the number one through frantic efforts,” Lee told South Korea’s Yonhap news agency this week. “Even if I become the number one, there is an entity that cannot be defeated.”