Lee Sedol Glossary

South Korean Go champion whose 2016 match with AlphaGo became one of the canonical public moments in modern AI history.

Lee Sedol is a South Korean 9-dan Go professional and one of the strongest players of his generation. His 2016 match against DeepMind’s AlphaGo became a canonical moment in AI history because Go had long been treated as a game where human intuition still held a deep advantage over machines.

AlphaGo won the match 4–1. Lee’s single victory, Game 4, remains culturally important because it showed both sides of the transition: machine strength had arrived, but human creativity had not simply vanished. His famous move 78 is remembered as a human answer inside a machine-dominated match.

For the Dictionary, Lee Sedol is a named marker for the moment AI stopped being merely impressive in benchmarks and became emotionally legible to the public as a challenge to human mastery.

See also

• Alan Turing
• Scaling Laws
• Capability Overhang

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