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).

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.

[2] Ranks tenth in total number of titles in Korea.

Players who have won international go titles in bold.