Full name Lee Sedol Hanja 李世乭 McCune–Reischauer I Sedol Name Lee Se-dol Residence South Korea Affiliation Korea Baduk Association | Hangul 이세돌 Revised Romanization I Sedol Rank 9 dan Role Go Player Teacher Kweon Kab-yong Turned pro 1996 | |
Born 2 March 1983 (age 41)
Sinan County, Jeollanam-do, South Korea ( 1983-03-02 ) Similar People Lee Chang‑ho, Park Jeong‑hwan, Cho Hun‑hyun | ||
Match 1 google deepmind challenge match lee sedol vs alphago
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"). He was defeated by the computer program AlphaGo in a 1-4 series in March 2016.
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Match 2 google deepmind challenge match lee sedol vs alphago
Biography
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.
Lee's Broken Ladder Game
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.
Match against AlphaGo
Starting March 9, 2016, Lee played a five-game match, broadcast live, against the computer program called AlphaGo, developed by a London-based artificial intelligence firm Google DeepMind, for a $1 million match prize. He said “I have heard that Google DeepMind’s AI is surprisingly strong and getting stronger, but I am confident that I can win at least this time”. In an interview with Sohn Suk-hee of JTBC Newsroom on February 22, 2016, he showed self-confidence again, while saying that even beating AlphaGo by 4-1 may allow the Google DeepMind team to claim its de facto victory and the defeat of him, or even humankind. In this interview he pointed out the time rule in this match, which seems well-balanced so that both he and the AI would fairly undergo time pressure.
In another interview at Yonhap News, Lee Se-dol said that he was confident of beating AlphaGo by a score of 5-0, at least 4-1 and accepted the challenge in only five minutes. He also stated "Of course, there would have been many updates in the last four or five months, but that isn’t enough time to challenge me".
On March 9, Lee played black and lost the first game by resignation. On March 10, he played white and lost the second game by resignation. On March 12, he played black and lost the third game as well. On March 13, he played white and won the fourth game, following an unexpected move at White 78 described as "a brilliant tesuji", and by Gu Li 9 dan as a "divine move" and completely unforeseen by him. GoGameGuru commented that this game was "a masterpiece for Lee Sedol and will almost certainly become a famous game in the history of Go". Lee commented after the victory that he considered AlphaGo was strongest when playing white (second). For this reason, he requested that he play black in the final fifth game, which is considered more risky. On March 15, he played black and lost the fifth game, to lose the Go series 1-4.
Lee confessed after the match "As a professional Go player, I never want to play this kind of match again. I endured the match because I accepted it."
Career record
Titles and runners-up
Ranks #3 in total amount of titles in Korea and #2 in international titles.
Trivia
At Tygem Lee Sedol plays as LeeShiShi.