Lee Soo-geun is incredibly good at billiards; he's almost professional level

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I saw Lee Soo-geun playing with players Park Jung-hyun and Heo Chae-won on a billiards channel.
I assumed the professional players would be coaching him while they played, but he actually beat Park Jung-hyun.
Lee Soo-geun lost to Heo Chae-won, who is likely the strongest player and a national tournament winner.
As for Park Jung-hyun, whom Lee Soo-geun defeated, she is a rising star who dominated the league before turning pro; she's known as the "Little Kim Ga-young" and recently climbed to 2nd in the prize money rankings after winning a pro league.
They say professional level is around 2000 points in billiards, and I think Lee Soo-geun is likely in the 2000s range.