Rank progression

1p	1984
2p	1984-07-06
3p	1985-05-24
4p	1986-10-17
5p	1988-05-06
6p	1989-10-13
7p	1992-04
8p	1994-09
9p	1998-04-17

Links

Wikidata Q28178

http://www.nihonkiin.or.jp/player/htm/ki000187.htm

SL http://senseis.xmp.net/?ChoSeonchin

zh https://zh.wikipedia.org/wiki/赵善津

ru https://ru.wikipedia.org/wiki/Тё Сондзин

ko https://ko.wikipedia.org/wiki/조선진

ja https://ja.wikipedia.org/wiki/趙善津

fr https://fr.wikipedia.org/wiki/Cho Sonjin

es https://es.wikipedia.org/wiki/Cho Sonjin

en https://en.wikipedia.org/wiki/Cho Son-jin

cs https://cs.wikipedia.org/wiki/Čo Sondžin