Lee_Sedol_9-dan

The only person who beats AI in Go!!!

Lee Sedol, or Lee Se-dol, is a former South Korean professional Go player of 9 dan rank. As of February 2016, he ranked second in international titles, behind only Lee Chang-ho. His nickname is "The Strong Stone". 

AlphaGo versus Lee Sedol, also known as the Google DeepMind Challenge Match, was a five-game Go match between top Go player Lee Sedol and AlphaGo, a computer Go program developed by Google DeepMind, played in Seoul, South Korea between 9 and 15 March 2016. -Wikipedia

AlphaGo was probably the most challenging player he had met in his whole life. 

In the picture, it was game 4, facing to lose to last 3 games against Alpha, Lee Sedol didn't flinch. He played as white and he is much calmer than in the last 3 games, and at move 78, he played the Hand of God move, wedge at L11. and at last, AlphaGo ultimately resigned.

The 78th move of the game is said to be the cornerstone of his victory. Commentators have called it “the divine move” (“Brilliant tesuji”). -Medium

Disclaimer: I am his fan, not him but I wish I could be a go player as strong as him one day! Add me friend and message me if you know him or if you are a Go Player!