Editor’s note: Lee Sae Dol is a professional Go player who played a now-famous public match against AlphaGo, Google DeepMind’s AI system, back in 2016.As a world Go champion, I’d only ever played the game against other humans. That changed in 2016 when I played a five-match game of Go against AlphaGo, Google’s AI system. I admit, I underestimated just how powerful AI could be and ended up only winning one out of our five games together.When I first got the invitation from Google to play against ...