Career
He is the fourth youngest (12 years 2 months) to become a professional Go player in South Korean history behind Cho Hun-hyun (9 years 7 months), Lee Chang-ho (11 years 1 months) and Cho Hye-yeon (11 years 10 months). His nickname is "The Viper". Choi became a professional when he was 12 years old.
He began playing Go at the age of seven, studying with Lee Sedol in Kweon Kab-yong"s academy in Seoul.
At that time, Choi was considered the next Lee Sedol. Korean Baduk League Chinese A League.