What is Lee Sedol's profession? The Sicilian defense is a tactic of which game? Would #1 typically invest time in learning about #2?
Sicilian Defence
Lee Sedol is a former South Korean professional Go player of 9 dan rank. Go has a different rule set than chess. It would not be worthwhile to spend time understanding the complexities of a game that you don't play professionally.
Chess opening
Would Lee Sedol understand the complexities of the Sicilian Defence?