Cho Seokbin (趙錫彬) was yeongusaeng in Korea till age 16 when he stopped due to circumstances beyond his control. As a result, he is not a professional go player and is now over the age limit in Korea. Nonetheless, he is very strong. In 2006, he moved to Germany, then Poland, where he taught go and won many go tournaments. As of now (2014) he lives in Nagoya, Japan, where he teaches insei at a club.
He is the current Amateur-Kisei which is equivalent to the official strongest amateur in Japan. (, , )
New joseki, invented by Cho: http://gogame.info/samples.html?id=26
Apr 2007 interview with Cho Seokbin at by Sorin Gherman at 361points.
He was once the highest rated european amateur player.
 Short article for Amateur Kisei 2014
 Facebook page: https://www.facebook.com/cho.seokbin
 Visit in Portland 2007: https://www.flickr.com/photos/aenigma/sets/72157600190580856/
 Vienna 2013: http://intergofed.org/13-igf-news-feed/228-seok-bin-cho-sweeps-vienna.html