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| | white | black | year | event | guessed | | | Cho Chikun (1p) | Kato Masao (4p) | 1975 | 12th Pro best Ten | | start | | Otake Hideo (9p) | Kato Masao (7p) | 1975 | Oza, 23rd | | start | | Takagawa Kaku (9p) | Kato Masao (8p) | 1975 | Honinbo, 30th | | start | | Cho Chikun (6p) | Kobayashi Koichi (7p) | 1975 | 19th Prime Minister's Cup | | start | | Sakata Eio (9p) | Kudo Norio (8p) | 1975 | All Japan First Place Tournament, 5th | | start | | Cho Chikun (6p) | Kusunoki Teruko (5p) | 1975 | 31st Honinbo | | start | | Tono Hiroaki (9p) | Magari Reiki (9p) | 1975 | Tengen, 1st | | start | | Iwamoto Kaoru (9p) | Miyamoto Yoshihisa (9p) | 1975 | Tengen, 1st | | start | | Kato Masao (8p) | Rin Kaiho (9p) | 1975 | All Japan First Place Tournament, 5th | | start | | Yamabe Toshiro (9p) | Rin Kaiho (9p) | 1975 | Meijin (Yomiuri), 14th | | start | | Ishida Yoshio (9p) | Sakata Eio (9p) | 1975 | Honinbo, 30th | | start | | Rin Kaiho (9p) | Sakata Eio (9p) | 1975 | Honinbo, 30th | | start | | Ezura Yuichi (5p) | Takagi Shoichi (7p) | 1975 | 19th Prime Minister's Cup | | start | | Hashimoto Utaro (9p) | Takemiya Masaki (8p) | 1975 | Pro Best Ten Tournament, 12th | | start | | Hoshino Toshi (8p) | Takemiya Masaki (7p) | 1975 | Oteai | | start | | Sakata Eio (9p) | Takemiya Masaki (7p) | 1975 | Honinbo, 30th | | start | | Chen Huifang (4p) | Chen Zude (9p) | 1975 | 3rd All-China Sports Go Tournament | | start | | Kojima Takaho (7p) | Cho Chikun (6p) | 1975 | Oteai | | start | | Kajiwara Takeo (9p) | Fujisawa Shuko (9p) | 1975 | Pro Best Ten, 12th | | start | | Cho Chikun (6p) | Hashimoto Utaro (9p) | 1975 | Tengen, 1st | | start | | Takagawa Kaku (9p) | Hashimoto Utaro (9p) | 1975 | Meijin (Yomiuri), 14th | | start | | Rin Kaiho (9p) | Hayase Hiroshi (7p) | 1975 | Oza, 23rd | | start | | Sakata Eio (9p) | Ishida Yoshio (9p) | 1975 | Honinbo, 30th | | start | | Cho Chikun (6p) | Kamimura Haruo (4p) | 1975 | Oteai | | start | | Fujisawa Hosai (9p) | Kato Masao (8p) | 1975 | All Japan First Place Tournament, 5th | | start |
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