Lee Sedol
| Lee Sedol | |
|---|---|
Lee Sedol in 2016
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| Hangul | 이세돌 |
| Hanja | 李世乭 |
| Revised Romanization | I Sedol |
| McCune–Reischauer | Ri Sedol |
| Born |
2 March 1983 Sinan County, South Jeolla Province, South Korea |
| Residence | South Korea |
| Teacher | Kweon Kab-yong |
| Turned pro | 1995 |
| Rank | 9 dan |
| Affiliation | Hanguk Kiwon |
| Medal record | ||
|---|---|---|
Representing  South Korea
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| Asian Games | ||
 |
2010 Guangzhou | Men's Team |
Lee Se-dol (Korean: 이세돌; born 2 March 1983) is a South Korean professional Go player of 9 dan rank. As of February 2016, he ranked second in international titles (18), behind only Lee Chang-ho (21). He is the fifth youngest (12 years 4 months) to become a professional Go player in South Korean history behind Cho Hun-hyun (9 years 7 months), Lee Chang-ho (11 years 1 months), Cho Hye-yeon (11 years 10 months) and Choi Cheol-han (12 years 2 months). His nickname is "The Strong Stone" ("Ssen-dol"), and he was defeated by the computer program AlphaGo in a 1-4 series.
Lee was born in South Korea in 1983 and studied at the Korea Baduk Association. He ranks second in international titles (18), behind only Lee Chang-ho (21). Despite this, he describes his opening play as "very weak". Lee is married and has one daughter. In February 2013, Lee announced that he planned to retire within three years and move to the U.S. to promote Go. He plays on Tygem as "gjopok". He is known as 'Bigeumdo Boy' because he was born and grew up on Bigeumdo Island.
This was a match between Lee Sedol and Hong Chang-sik during the 2003 KAT cup, played on 23 April 2003. This game is notable for Lee's use of a broken ladder formation.
Normally playing out a broken ladder is a bad mistake, a pitfall associated with bad beginner play; the chasing stones are left appallingly weak. Between experts it should be decisive, leading to a lost game. Lee, playing black, defied the conventional wisdom, pushing development of the ladder to capture a large group of Hong's stones in the lower-right side of the board. Although Black could not capture the stones in the ladder, White ultimately resigned.
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