Lee Sedol

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Lee Se-dol
Full nameLee Se-dol
Hangul이세돌
Hanja李世乭
Revised RomanizationI Se-dol
McCune–ReischauerI Se-dol
Born (1983-03-02) 2 March 1983 (age 36)[1]
Sinan County, Jeollanam-do, South Korea
ResidenceSouth Korea South Korea
TeacherKweon Kab-yong[1]
Turned pro1996
Rank9 dan[1]
AffiliationHanguk Kiwon[1]

Lee Se-dol (born 2 March 1983) is a South Korean professional Go player of 9-dan rank.[1] As of February 2016, he ranks second in international titles (18), behind only Lee Chang-ho (21).

Biography

Lee was born in South Korea in 1983 and studied at the Hanguk Kiwon. He ranks second in international titles (18), behind only Lee Chang-ho (21). Despite this, he describes his opening play as "very weak".[2]

Lee is married and has one daughter.[3]

In February 2013, Lee announced that he planned to retire within three years and move to the USA to promote Go.[4]

He plays on Tygem as "gjopok".[5]

Much more information is listed on Sensei's Library: [2], including a discussion of his playing style and particular strengths and weaknesses.

Match against AlphaGo

Starting March 9, 2016, Lee is due to play 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.[6][7][8] 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”.[9]

In an interview with Sohn Suk-hee of JTBC Newsroom on February 22, 2016,[10] 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.

Lee's Broken Ladder Game

This was a match between Lee Se-dol and Hong Chang-sik during the 2003 KAT cup. 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. [11]

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Moves 67 to 74 (Black: Lee Se-dol; White: Hong Chang-sik)
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Moves 89 to 97 (Black wins when White resigns at move 211)

Promotion record

Rank Year Notes
1 dan 1995 Promoted to professional dan rank after passing qualifying test.
2 dan 1998
3 dan 1999
4 dan 2003
5 dan 2003
6 dan 2003 Won the LG Cup against Lee Chang-ho.
7 dan 2003 Runner up in the KT Cup against Yoo Changhyuk.
8 dan 2003 Skipped over because of the Hanguk Kiwon promotion rules.
9 dan 2003 Won Fujitsu Cup against Song Tae Kon.

Career record

  • Total: 472 wins, 185 losses, 0 jigos (71.8% winning percentage)[1]

Titles and runners-up

Ranks #3 in total amount of titles in Korea and #2 in international titles.

Domestic
Title Wins Runners-up
Guksu 2 (2007, 2009) 1 (2014)
Myungin 3 (2007, 2008, 2012) 1(2013)
Siptan 1 (2011)
GS Caltex Cup 3 (2002, 2006, 2012) 2 (2007, 2013)
Prices Information Cup 3 (2006, 2007, 2010) 1 (2008)
Chunwon 1 (2000) 2 (2006, 2008)
KBS Cup 2 (2006, 2014) 3 (2001, 2004, 2009)
Maxim Cup 4 (2005–07, 2014) 1 (2013)
Wangwi 2 (2002, 2004)
Baedalwang 1 (2000)
BC Card Cup 1 (2002)
KTF Cup 1 (2002)
KT Cup 1 (2003)
SK Gas Cup 1 (2002) 1 (2000)
New Pro King 1 (2002)
Paedal Cup 1 (2000)
Olleh KT Cup 2 (2010, 2011)
Total 27 15
Continental
China-Korea New Pro Wang 1 (2002)
China-Korea Tengen 1 (2001)
Total 1 1
International
Asian TV Cup 4 (2007, 2008, 2014, 2015) 1 (2009)
LG Cup 2 (2003, 2008) 2 (2001, 2009)
BC Card Cup 2 (2010, 2011)
Samsung Cup 4 (2004, 2007, 2008, 2012) 1 (2013)
Chunlan Cup 1 (2011) 1 (2013)
Fujitsu Cup 3 (2002, 2003, 2005) 1 (2010)
World Oza 2 (2004, 2006)
Zhonghuan Cup 1 (2005)
Mlily Cup (梦百合杯) 1 (2015/16)
Total 18 8
Career total
Total 46 24[12]

Korean Baduk League

Season Team Place Record
2007 Team No.1 Fire Insurance (Captain) 4th place 9–5[13]
2008 Team No. 1 Fire Insurance (Captain) 4th place 13–3[14]
2010 Team Shinan Chunil Salt (Captain) Champions 16–2[15]
2011 Team Shinan Chunil Salt (Captain) TBD 1–2[16]

Chinese A League

Season Team Place Record
2007 Team Guizhou (Captain) 2nd place 9–3[17]
2008 Team Guizhou (Captain) 2nd place 8–0[18]
2009 Team Guizhou (Captain) 8th place 6–4[19]

References

  1. ^ a b c d e f Lee SeDol gobase.org, accessed 22 June 2010
  2. ^ Lee Sedol Interview justplaygo.com, accessed 22 June 2010 Template:Wayback
  3. ^ An Younggil. "Biography of Lee Sedol". Retrieved 2013-02-11.
  4. ^ An Younggil. "Interview with Lee Sedol". Retrieved 2013-02-11.
  5. ^ [1] gosensations.com, accessed 19 February 2012
  6. ^ "Google to Livestream 'Go' Battle Between World Champ, AI Tech". PCMAG. Retrieved 2016-02-08.
  7. ^ Elizabeth Gibney (27 January 2016). "Go players react to computer defeat".
  8. ^ "Computer Says Go". The Economist. 30 January 2016. Retrieved 4 February 2016.
  9. ^ "YouTube will livestream Google's AI playing Go superstar Lee Sedol in March". VentureBeat. Retrieved 2016-02-08.
  10. ^ "[인터뷰] 이세돌 "5대 0으로 이기지 않으면 의미 없다고 생각해"". news.jtbc.joins.com (in Korean). Retrieved 2016-02-25.
  11. ^ Sensei's Library: Lee Se-dol - Hong Chang Sik - ladder game
  12. ^ Lee Sedol 9p gogameworld.com, accessed 22 June 2010
  13. ^ "2007 Korean Baduk League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  14. ^ "2008 Korean Baduk League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  15. ^ "2010 Korean Baduk League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  16. ^ "2011 Korean Baduk League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  17. ^ "2007 Chinese A League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  18. ^ "2008 Chinese A League". igokisen.web.fc2.com. Retrieved 13 June 2011.
  19. ^ "2009 Chinese A League". igokisen.web.fc2.com. Retrieved 13 June 2011.