Considered one of the greatest players of all time,[2][3] Cho reached professional level in Korea in 1962.

Originally intended to study under Minoru Kitani, Kensaku Segoe took Cho under his tutelage.

Segoe was responsible for bringing Go Seigen to Japan and also teaching Utaro Hashimoto, founder of the Kansai Ki-in.

[8] Cho was considered a 2 dan professional in Korea, but was demoted to 4 kyu upon arriving in Japan.

[5][9] In 1980, he held nine titles simultaneously: Guksu, Myungin, Wangwi, Kisung, Paewang, Kiwang, Daewang, Jaewang and the Baccus Cup.

Instead, the media favored Cho Chikun, a Korean-born 9 dan professional in Japan.

In 1980, Cho Chikun visited South Korea after winning the Meijin title and the two began a friendship match consisting of two games.

[13] On 5 February 2020, Cho was appointed as the Secretary-General of the newly formed Future Korea Party.

2015, The Power of Master's Thinking 2018, Go with the Flow, is a 2015 autobiography written by Korean, professional 9-dan Cho Hunhyun and translated by You Jungmin.

Since he became a professional Go player at the age of nine, he has won 1,935 matches and taken various championship titles as many as 160 times over 56 years, achieving unprecedented record in the world Go history.