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| | white | black | year | event | guessed | | | Hane Yasumasa (9p) | Ishida Yoshio (9p) | 1990 | 3rd IBM Hayago Open | | start | | Yoda Norimoto (7p) | Ishii Kunio (9p) | 1990 | 38th Oza | | start | | Yoda Norimoto (7p) | Izumitani Hideo (4p) | 1990 | Oza, 38th | | start | | Yoo Chang Hyuk (3p) | Jeong Hyeon San (3p) | 1990 | Kiseong, 2nd | | start | | Jeong Hyeon San (3p) | Kang Hun (7p) | 1990 | Kiseong, 2nd | | start | | Yang Jae Ho (6p) | Kang Hun (9p) | 1990 | Ch'oegowi, 30th | | start | | Okada Yumiko (1p) | Kanno Naomi (2p) | 1990 | 3rd Female Meijin | | start | | Fukui Susumu (7p) | Kobayashi Kenji (6p) | 1990 | Japan Promotion Tournament, 1990 | | start | | Fukui Susumu (7p) | Kobayashi Kenji (6p) | 1990 | Oteai 1990 | | start | | Cho Chikun (9p) | Kobayashi Koichi (9p) | 1990 | Honinbo, 45th | | start | | Cho Chikun (9p) | Kobayashi Koichi (9p) | 1990 | Honinbo, 45th | | start | | Kobayashi Satoru (9p) | Kobayashi Koichi (1p) | 1990 | 15th Gosei title | | start | | Sakakibara Fumiko (2p) | Kobayashi Reiko (6p) | 1990 | 12th Women's Kakusei | | start | | Sugiuchi Kazuko (8p) | Kobayashi Reiko (6p) | 1990 | 3rd Female Meijin | | start | | Kobayashi Koichi (1p) | Kobayashi Satoru (9p) | 1990 | 15th Gosei title | | start | | Kobayashi Koichi (9p) | Kobayashi Satoru (9p) | 1990 | 15th Gosei Final | | start | | Arimura Hiroshi (3p) | Konagai Masaru (5p) | 1990 | 1st Ryusei B | | start | | Kang Man Woo (6p) | Lee Bong Keun (7p) | 1990 | Ch'oegowi, 30th | | start | | Arimura Hiroshi (3p) | Matsuoka Hideki (4p) | 1990 | 1st Ryusei B | | start | | Hane Yasumasa (9p) | Ma Xiaochun (9p) | 1990 | 3rd IBM Hayago Open | | start | | Nie Weiping (9p) | Ma Xiaochun (9p) | 1990 | Tengzhou Cup Invitation Tournament | | start | | Shoji Kazuko (3p) | Nakayama Kaoru (2p) | 1990 | 3rd Female Meijin | | start | | Kobayashi Chizu (Female Kakusei) | Nakazawa Ayako (1p) | 1990 | 3rd Female Meijin | | start | | Cho Hun-hyeon (9p) | Nie Weiping (9p) | 1990 | 3rd Fujitsu Cup | | start | | Ogawa Tomoko (4p) | Nishida Terumi (2p) | 1990 | 3rd Female Meijin | | start |
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