Seo Bong-soo

{{Infobox go player

| name=Seo Bong-soo

| image=Seo bongsoo.jpg

| hangul=서봉수

| hanja=徐奉洙

| revisedromanization=Seo Bong-su

| mccunereischauer=Sŏ Pongsu

| birth_date={{birth date and age|1953|2|1}}

| birth_place=Daedeok-gu, Daejeon, South Korea{{cite web|url=https://www.seoul.co.kr/news/newsView.php?id=20160616029006|title=[한길 큰길 그가 말하다] <19> 바둑도, 인생도 9단 '토종 승부사' 서봉수|website=Seoul Shinmun|date=2016-06-16|access-date=2023-04-22|language=ko}}

| residence={{flagicon|South Korea}} South Korea

| turnedpro=1970

| rank=9 dan

| affiliation=Hanguk Kiwon

}}

Seo Bong-soo ({{langx|ko|서봉수}}; born February 1, 1953) is a professional Go player.

Biography

Seo Bong-soo turned professional in 1970. By 1986 he became the 4th ever Korean 9 dan. He was Cho Hunhyun's biggest rival in the 1980s and frequently challenged Cho in major title events. During their career, Seo and Cho played against each other in more than 350 official games, which is a world record. He was a part of the "Gang of Four"{{cite web|url=http://senseis.xmp.net/?SeoBongSoo|title=Seo Pong-su|publisher=Sensei's Library|date=30 July 2015|accessdate=18 February 2016}} of Korean Go in 1990s, the rest being Cho Hunhyun, Lee Chang-ho, and Yoo Changhyuk. He made an amazing run of wins in 1997 during the 5th SBS Cup. He played as fourth captain for Korea, and singlehandedly beat the entire Chinese team as well as what was left of the Japanese team—a winning streak of 9 straight games.