Cho Nam-chul
Cho Namchul (November 30, 1923 - July 2, 2006, alternately Cho Namcheol) was a professional Go player (Baduk in Korean). He died of natural causes in Seoul at the age of 83.
Cho Gyeong-chul
Later in life, he developed heart disease, and was hospitalized in Severance Hospital with high fever on March 2, 2010. He later suffered a heart attack and lost consciousness. He died on March 6, 2010.