Yi Ch'ang-ho (Lee Changho, RR?: I Chang-ho, M-R: Yi Ch'ang-ho, born 29 July 1975) is a Korean, professional 9-dan. He is considered to have been the strongest player in the world from around 1995 through 2006.
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Yi Ch'ang-ho 6-dan v. [Cho Chikun] 9-dan, 1993-04-22, Yi completely dictates the pace with a flurry of miai moves
Yi was born on 29 July 1975. He learned go from his grandfather at the age of six, and became apprentices to Cheon Yeong-seon 6-dan at eight. In 1984, he won a national youth championship, placed 3rd in the World Youth Goe Championship, and became a live-in disciple of Cho Hun-hyeon. He became an insei the following year and a 1-dan professional the year after in 1986. In the late 1980s, he started winning the Korean titles that his teacher, Cho, had long been dominating. In 1992, he won his first international title (the 3rd Tong Yang Securities Cup). As of 2009, his record in major international titles stands at #1. With his win of the Chunlan Cup tournament against Hane Naoki in 2003 Yi Chang-ho has won every single international Go tournament at least once (not counting obsolete tournaments that he couldn't have participated in). The Korean press calls this a "Grand Slam" in go. On 28 October 2010, Yi married amateur go player Lee Do-yoon?.
Yi Chang-ho has had many nicknames, the most suitable of which has been the "Stone Buddha." This nickname reflects the fact that he usually keeps a tight poker face, rarely revealing his emotions and state of mind during events; and during his earlier play style, before the mid 2000s, he opted for peaceful and defensive games that would usually lead into whoever could play the better endgame. As such, he was the 'stone statue of Buddha.'
Yi employed a fantastic ability to dictate a leisurely pace right from the opening, whether playing as Black or White. He often played probes which would limit the opponent's strategic options, and found sequences that would guarantee making miai of all the large points. He often found ways to concede to an opponent's intention and avoid nasty conflicts without falling behind. This strategy was made possible due to his fantastic endgame calculation. If anything, one of Yi's most well-known traits is his brilliant and subtle endgame play, with the Koreans' terming Yi's endgame skill as 'divine calculation'. In Yi's earlier games, important groups rarely died -- neither his nor his opponent's.
For many years, players didn't fully understand how strong Yi was. He did not pull clear ace-in-the-hole moves that left audiences stunned or overwhelm opponents with powerful fighting/attacking. Instead, his 'brilliant' moves could often said to be subtle, hiding their intent beneath the surface.
Yi's first teacher, Cheon Yeong-seon, said that Yi always tried to come up with myoshu. Then Yi became a pupil of Cho Hun-hyeon. At first, Cho doubted the talent of the kid, since he could not even perfectly reproduce the game he played that day. The conventional wisdom dictates that a go genius is endowed with magnificent intuition, quick razor sharp analytical ability, and vast memory. In Cho's assessment, the kid fell short of expectation in most categories of natural talent. But, Cho noticed that Yi was amazingly studious and was a deep thinker endowed with a different mindset. He later decided that Yi was of a "different type" of go genius.
During his studies under Cho, Yi's style got completely overhauled. He has become a master of "common" moves instead of myoshu.
Yi has come to prefer a safer move (from which he can plan future moves by being able to predict the opponent's reactions with high probability) to a myoshu that leaves unpredictability down the road. In so doing, Yi minimizes the factor of chance arising from difficult situations. In short, he has become a "control freak."
So why was he to be transformed from a lover of myoshu to a seeker of seemingly average yet certain, effective moves? The reason is not precisely known. Yet, it is ventured that the motivation could have been the natural talent of his teacher, Cho Hun-hyeon, who is often dubbed as the most talented player.
In the early stage of his career, Yi was criticized that his playing style was molded only to beat the teacher, Cho (as he was not as dominant over other top players). Although he later proved that his style was effective against anyone, the criticism has some truth as he confessed later indirectly that his goal was to beat the teacher.
It was a question of how. Yi simply could not match Cho in natural brilliance. That is, it was impossible for Yi to follow in the footsteps of Cho and surpass him. Instead, Yi chose a path along which his magnificent calculation and deep thinking triumphs over Cho's natural brilliance and quick thinking.
Simplification is the word that best fits Yi's style. In his game, everything is simplified. However, that the level of simplification is quite relative. Hence, many were, and still are, unimpressed by his game (until they get to play him, as Chang Hao said). Quoting loosely his teacher, Cho Hun-hyeon, Yi sits and waits patiently in the depths of the unknown. You wait and wait to find out what Yi hides in the depths. You finally run out of patience and jump into the deep. Without fail, you find yourself trapped in the depths.
In other words, it is the depth of simplicity.
Around 2001, Yi began to be challenged by a new generation of players. His simple approach and peaceful methods became less successful as fighting players, such as Yi Se-tol and Ch'oe Ch'eol-han, found ways to first force Yi into attacking positions and then turn them into all out fights where the other player could outmaneuver Ch'ang-ho. The first part of this method was most famously demonstrated in the 2001 LG Cup final against fellow counterman Yi Se-tol. In games one, two, and five Se-tol played stones and left unsettled groups that enticed Ch'ang-ho into directions where attacking was the clearest and simplest way to gain an advantage. Once Ch'ang-ho began attacking, Se-tol would try to outmaneuver Ch'ang-ho in disadvantageous or slack results by threatening whole board fighting, which Ch'ang-ho would want to avoid. These fights also seemed to occasionally unsettle Ch'ang-ho, causing him to make surprising mistakes, lapses in judgement, or play at an uncharacteristic pace. Subsequent interviews have also stated that Yi had felt considerable pressure to perform against the new, younger players.
According to Kim Seungjoon 7d, part of the reason Yi Ch'ang-ho began to lose his composure was that he was no longer guaranteed to win by sticking to his old style. While some younger Korean players he inspired became as good in calculation, reading positions, and the endgame as he was, Yi was being forced to abandon or rely less upon his old style of often conceding a few battles and still winning the war. Yi pursues a new style that is more battle ready, much stingier, and more tightly gripped upon opponents.
Cho Hun-hyeon takes an insightful look into what is happening with his pupil and Yi Se-tol: "Is the era of Yi Ch'ang-ho over? No. It is just that the time has finally come that Yi Ch'ang-ho has a legitimate rival. The two will battle head to head for many years to come. After the smoke clears, we will see whose time this is." Being a veteran of the two greatest rivalries of the Korean Go history -- Cho beating Seo BongSoo by 2-1 ratio over a decade and then losing to Yi Ch'ang-ho by the similar ratio over the next decade -- Cho senses another rivalry brewing, something Yoo ChangHyuk could not give to Yi Ch'ang-ho.
Yi Ch'ang-ho will change as Cho had to change in order to stay toe to toe with the pupil of his who shot him down from the very top of the world. Whether or not Yi is truly one of the greatest of all time will depend on what his metamorphosis may become and how effective it might turn out to be.
Park Chimoon, a Korean Go critic, said that Yi Ch'ang-ho might be the greatest go strategist of all time as Yi has successfully come back against the so called Yi Ch'ang-ho killers (e.g., Yoda Norimoto et al.). We will see the real truth of it in as the smoke of rivalries clear.
Chang Hao 9p: You get to know how strong Yi is only when you play him.
Rin Kaiho: "When you're playing Lee, you get nervous if the game is close. But if you do anything the slightest bit unreasonable, he immediately pounces on you. There's just no way to handle him." - Go World Iss. 71 p. 26 (1994)
"Lee Chang-ho is confident in his endgame ability and he probably believes that if a game becomes a leisurely one he'll win it. I think that he's researched the opening well so that he can get the kind of game he likes." - Go World Iss. 71 p. 19 (1994)
Rui Naiwei: Yi lets you do what you want yet wins over you at the end.
Ryu Shikun: "When I was a child, I believed that go was not a game of calculation, but Lee would accurately count one-point wins. At first, that astonished me. Nowadays, he's already calculated the score even when there are still various places to fight. And his figures are quite accurate. He virtually never makes a mistake in the endgame." - Go World Iss. 71 p. 26 (1994)
|Year||# of Titles||Title Names|
|1989||2||8th KBS Cup; 5th New King Tournament?|
|1990||3||29th Ch'oegowi; 8th Daewang; 34th Kuksu|
|1991||6||8th Bacchus Cup; 9th Bacchus Cup; 30th Ch'oegowi; 22nd Myeongin; 9th Taewang; 25th Wangwi|
|1992||8||10th Bacchus Cup; 2nd B.C. Card Cup; 31st Ch'oegowi; 9th Daewang; 11th KBS Cup; 23rd Myeongin; 10th Taewang; 3rd Tong Yang Securities Cup|
|1993||10||3rd B.C. Card Cup; 10th Daewang; 4th Kiseong; 16th Kukgi?; 37th Kuksu; 24th Myeongin; 1st Paedal Wang; 1st SBS Cup; 11th Taewang; 4th Tong Yang Securities Cup|
|1994||11||4th B.C. Card Cup; 33rd Ch'oegowi; 12th Daewang; 5th Kiseong; 18th Kiwang; 17th Kukgi; 38th Kuksu; 25th Myeongin; 29th P'aewang; 2nd Paedal Wang; 2nd SBS Cup|
|1995||13||7th Asian TV Cup; 5th B.C. Card Cup; 34th Ch'oegowi; 13th Daewang; 13th KBS Cup; 6th Kiseong; 19th Kiwang; 18th Kukgi; 39th Kuksu; 26th Myeongin; 30th P'aewang; 3rd Paedal Wang; 3rd SBS Cup|
|1996||12||8th Asian TV Cup; 1st Ch'eonweon; 35th Ch'oegowi; 14th Daewang; 9th Fujitsu Cup; 7th Kiseong; 19th Kukgi; 40th Kuksu; 27th Myeongin; 7th Tong Yang Securities Cup; 30th Wangwi; 1st World Go's Strongest Player Tournament?|
|1997||12||7th B.C. Card Cup; 2nd Ch'eonweon; 36th Ch'oegowi; 1st China-Korea Tengen; 15th Daewang; 2nd GS Caltex Cup; 8th Kiseong; 41st Kuksu; 1st LG Cup; 2nd Samsung Cup; 4th Paedal Wang; 31st Wangwi|
|1998||10||3rd Ch'eonweon; 37th Ch'oegowi; 2nd China-Korea Tengen; 11th Fujitsu Cup; 3rd GS Caltex Cup; 9th Kiseong; 29th Myeongin; 3rd Samsung Cup; 9th Tong Yang Securities Cup; 32nd Wangwi|
|1999||9||4th Ch'eonweon; 38th Ch'oegowi; 3rd China-Korea Tengen; 17th KBS Cup; 10th Kiseong; 3rd LG Cup; 30th Myeongin; 4th Samsung Cup; 33rd Wangwi|
|2000||6||4th China-Korea Tengen; 4th Ing Cup; 19th KBS Cup; 11th Kiseong; 31st Myeongin; 34th Wangwi|
|2001||7||6th GS Caltex Cup; 20th KBS Cup; 12th Kiseong; 5th LG Cup; 32nd Myeongin; 35th P'aewang; 35th Wangwi|
|2002||8||14th Asian TV Cup; 21st KBS Cup; 13th Kiseong; 45th Kuksu; 33rd Myeongin; 36th P'aewang; 36th Wangwi; 1st World Oza|
|2003||6||4th Chunlan Cup; 8th GS Caltex Cup; 14th Kiseong; 46th Kuksu; 34th Myeongin; 37th Wangwi|
|2004||5||9th GS Caltex Cup; 23rd KBS Cup; 8th LG Cup; 1st TEDA Cup; 38th Wangwi|
|2005||5||5th Chunlan Cup; 2nd Etland Cup; 24th KBS Cup; 49th Kuksu; 39th Wangwi|
|2006||3||3rd Etland Cup; 1st Siptan; 40th Wangwi|
|2007||3||26th KBS Cup; 41st Wangwi; 3rd Zhonghuan Cup|
|2008||2||5th Etland Cup; 3rd Siptan|
|2009||2||27th KBS Cup; 37th Myeongin|
|2010||2||28th KBS Cup; 53rd Kuksu|
to be added
- 1986: 8 wins 3 losses (72.7%)
- 1987: 44-11 (80.0%)
- 1988: 75-10 (88.2%)
- 1989: 84-27 (75.7%)
- 1990: 78-12 (86.7%)
- 1991: 65-19 (77.4%)
- 1992: 81-21 (79.4%)
- 1993: 90-19 (82.6%)
- 1994: 71-19 (79.4%)
- 1995: 63-13 (82.9%)
- 1996: 63-30 (67.7%)
- 1997: 72-19 (79.1%)
- 1998: 49-15 (76.6%)
- 1999: 51-10 (83.6%)
- 2000: 55-11 (83.3%)
- Total: 949-239 (79.9%)
Regarding Rui Naiwei's favorable record against Yi Changho -- 6 to 2 in favor of Rui as of February 2005 -- the prevailing theory goes as follows. It takes a terrific aggressive player to defeat Yi Changho. Cho Hun-hyeon even had to change his style in favor of more aggressive all out warfare against his pupil. Yi's series of defeats by younger players such as Yi Setol and Choi CheolHan support the view. Rui's playing style is undoubtedly one of the most aggressive. Her ultra-aggressive and creative offense may offer greater challenges for Yi as he cannot predict Rui's next moves and thus fails to take control of the game like he usually can do against other players.
One quasi-theory goes like this: Rui greatly admires Yi as both a player and as a person. Inspired, she plays her best game against Yi. One can imagine how the two above factors combine to a plausible--though not necessarily correct--explanation that Rui plays an unusually inspired game against Yi, and her style is very difficult for Yi to handle.
Another possibility is that, having played only eight games so far--without any series or multi-game matches--it is hard to say that Rui even necessarily has an edge over Yi. The law of averages may eventually catch up.
Always modest, Rui says that Yi is beyond her and that she does not understand how she could defeat Yi, a far superior player, so many times. Nevertheless, it would be interesting to hear if those are her true thoughts on the matter.
Yoda Norimoto was noted as giving Yi a hard time in international tournaments for many years, leading Yoda to be considered one of the Japanese aces in many international team tournaments. As of 7 June 2008, Yoda's record against Yi is 10-0-9.
It is widely believed that Yi has a superior endgame technique and that he starts to play endgame moves sooner in the middle game than his opponents. But a short inspection of his games shows some other interesting aspects. It seems that he likes to play tenuki even more than the other guy. Of course, this is based on very good reading of the position, but the impression is that he plays contrary to the proverb. He plays big moves rather than urgent moves. Well, it turns out that he had read it out and found that the "urgent" move was not so urgent.
It seems also that he is fond of the approach ko. Quite often rather large groups are at stake because he preferred a big move to a safe move earlier.
- 21st Century Baduk Special Topics Series
- GO Invasion et reduction
- Lee Changho's Novel Plays And Shapes
- Lee Changho Jingjiang Weiqi Shoujin
- Lee Changho Jingjiang Weiqi Sihuo
-  Source: http://gobase.org/games/inter/titles/samsung/4/
-  Source: Go World Iss. 65 p. 39.
-  Source: GoGoD, Yi Ch'ang-ho - milestones on the way to 100 titles.
- One of the funny stories about Yi Ch'ang-ho is that he did not know how to tie his own shoelaces even into his young adult years. While Yi studied under Cho Hun-hyeon as an in-house pupil, Mrs. Cho bought him shoes without laces because he would drag his feet around until someone finally tied them for him. I have heard many similar stories about how Yi Ch'ang-ho was totally preoccupied with Go and could not or did not pay attention to the everyday aspects of life.
- Regarding Yi's infamous inability to reproduce his own games, his brother recently posted a short message in Yi's homesite that even after he made professional rank, Yi Ch'ang-ho sometimes had difficulties reproducing his own games "in front of Cho Hun-hyeon." I suspect that it may be largely psychological considering the shy nature of Yi's and the special relationship between teacher and pupil (Pressure? Oh, yeah...).
- 15 June 2010, 16.00 (Korean time): During a 40 minute long press conference in Korea, Yi Ch'ang-ho has announced his engagement to miss Yi Doyun . Miss Yi Doyun is a strong baduk player herself and a Myongji University graduate. She is 11 years younger than Yi Ch'Ang-ho, but Yi Ch'ang-ho replies: "In some ways I am rather young". They are already planning for a big(!?) family with 1-3 children.
- On 18 Jan. 2010, Lee obtained his 1,500th career win against Choi Cheolhan
- On 13 July 2012, Lee obtained his 1,600th career win. The win was against Park Jinsol?, in the preliminaries of the 14th Nongshim Cup.
- From 27 Feb. 1990 - 31 Aug. 1990, Yi Ch'ang-ho obtained 41 wins in 41 games. Complete list of these games.
- An Younggil's biography of Lee Changho: http://gogameguru.com/top-20-go-players-lee-changho-qiu-jun/
- English Fan club: http://baduk.eu
- His website (Korean): http://www.leechangho.com
- Interview: http://gogame.info/samples/16/index.html
- Lee Changho Facebook page: http://www.facebook.com/pages/Lee-Changho/115464808499619
- Lee Changho game collection: http://www.go4go.net/v2/modules/collection/byplayer2.php?pid=18
- Some excerpts from an interview: http://gobase.org/games/inter/titles/samsung/4/.
- Wikipedia entry: http://en.wikipedia.org/wiki/Lee_changho