The 1st Igo Masters Cup began on 24 February and ended on 23 July 2011. Eleven players participated: Kobayashi Koichi (Honorary Kisei, Meijin, and Gosei), Kudo Norio (Tengen 1997, Oza 1977), Rin Kaiho (Honorary Tengen), Kataoka Satoshi (Tengen 1982, 1983), Hane Yasumasa (Oza 1990), Ishida Yoshio (24th Honinbo), Takemiya Masaki (Meijin, Honinbo, and Judan), Cho Chikun (25th Honinbo, Honorary Meijin), O Rissei (Kisei, Judan, and Oza), Kobayashi Satoru (Kisei, Gosei 1995), Otake Hideo (Honorary Gosei). [1]
Kobayashi Koichi, Ishida Yoshio, Takemiya Masaki, Cho Chikun, and Otake Hideo were given first round byes. [2]
Quarter-finals | Semi-finals | Final | ||||||||
24 March | ||||||||||
Kobayashi Koichi | 1 | |||||||||
25 June | ||||||||||
Rin Kaiho | 0 | |||||||||
Kobayashi Koichi | 1 | |||||||||
24 March | ||||||||||
Ishida Yoshio | 0 | |||||||||
Kataoka Satoshi | 0 | |||||||||
Ishida Yoshio | 1 | |||||||||
Kobayashi Koichi | 0 | |||||||||
31 March | ||||||||||
Cho Chikun | 1 | |||||||||
Takemiya Masaki | 0 | |||||||||
25 June | ||||||||||
Cho Chikun | 1 | |||||||||
Cho Chikun | 1 | |||||||||
21 April | ||||||||||
Kobayashi Satoru | 0 | |||||||||
Kobayashi Satoru | 1 | |||||||||
Otake Hideo | 0 | |||||||||
The Nihon Ki-in (日本棋院), also known as the Japan Go Association, is the main organizational body for Go in Japan, overseeing Japan's professional system and issuing diplomas for amateur dan rankings. It is based in Tokyo. The other major Go association in Japan is Kansai Ki-in. Its innovations include the Oteai system of promotion, time limits in professional games, and the introduction of issuing diplomas to strong amateur players, to affirm their ranks.
Masao Kato Honorary Oza, also known as Kato Kensei, was a Japanese professional go player. A late bloomer, Kato won 46 titles, including the Oza eight times in a row. He also became the second player to reach 1,200 career wins, behind Rin Kaiho.
Cho Chikun25th HoninboHonorary Meijin is a professional Go player and a nephew of Cho Namchul. Born in Busan, South Korea, he is affiliated to Nihon Ki-in. His total title tally of 75 titles is the most in the history of the Japanese Nihon Ki-in. Cho is the first player to hold the top three titles—Kisei, Meijin, and Honinbo—simultaneously which he did for three years in a row. Cho is the first in history to win all of the "Top 7" titles in Japan which he achieved by winning the Oza in 1994. Cho U in 2011 and Iyama Yuta in 2013 would duplicate this feat, both by winning the Kisei. He is also one of the 'Six Supers' Japanese players that were most celebrated in the late twentieth century, along with Rin Kaiho, Otake Hideo, Takemiya Masaki, Kato Masao and his classmate and arch-rival Kobayashi Koichi. He is the author of several books on Go.
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Cho U is a Taiwanese professional Go player. He currently ranks 6th in the most titles won by a Japanese professional; his NEC Cup win in 2011 put him past his teacher Rin Kaiho and Norimoto Yoda. Cho is the first player in history to have held five of the top seven major titles simultaneously with Iyama Yuta being the second. Cho U, Naoki Hane, Keigo Yamashita and Shinji Takao make up the group of players in Japan called the "Four Heavenly Kings". His wife is one of Japan's best female go professionals, Izumi Kobayashi, the great Kitani's granddaughter and daughter of Kobayashi Koichi.
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