趙治勲
Cha has a nickname, "eternal Mr. Quarter-Finalist", because in many professional tournaments he would usually lose in the quarterfinals. In 1989, he beat Yamashiro Hiroshi and Ohira Shuzo to advance to the quarterfinals of the Fujitsu Cup, only to lose. The next year, he made it to the quarterfinals of the Fujitsu Cup again after beating Cho Chikun. In March 2008, he defeated Imamura Toshiya 9P in the Chunlan Cup.