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Games played by Kobayashi Koichi
Total: 1646; won: 990; winning percentage: 60.1%
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2019-03-23] 1st Nie Weiping Cup CJK Weiqi Masters Tournament, semi-final
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| Kobayashi Koichi 9p | Ma Xiaochun 9p | B+1.5 |  |
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| [2019-03-23] 1st Nie Weiping Cup CJK Weiqi Masters Tournament, round 1
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| Wang Runan 8p | Kobayashi Koichi 9p | W+R | |
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| [2019-03-14] 45th Japanese Meijin, preliminary
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| Kobayashi Koichi 9p | Kenmochi Joe 8p | B+R | |
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| [2019-02-14] 28th Japanese Ryusei, group A
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| Kobayashi Koichi 9p | Nakaonoda Tomomi 9p | W+14.5 | |
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| [2019-01-17] 45th Japanese Gosei, preliminary
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| Okada Yumiko 6p | Kobayashi Koichi 9p | B+R | |
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| [2018-12-27] 44th Japanese Kisei, preliminary
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| Kobayashi Koichi 9p | Kazama Jun 3p | W+2.5 | |
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| [2018-12-20] 75th Japanese Honinbo, preliminary
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| Takeuchi Kosuke 3p | Kobayashi Koichi 9p | B+6.5 | |
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| [2018-12-06] 44th Japanese Kisei, preliminary
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| Kobayashi Koichi 9p | Yoshihara Yukari 6p | B+R | |
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| [2018-10-11] 45th Japanese Tengen, preliminary
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| Ueno Asami 3p | Kobayashi Koichi 9p | B+0.5 | |
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| [2018-09-20] 67th Japanese Oza, preliminary
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| Kobayashi Koichi 9p | Nishimura Keiji 8p | W+0.5 | |
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| [2018-08-23] 57th Japanese Judan, preliminary
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| Takao Shinji 9p | Kobayashi Koichi 9p | B+7.5 | |
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| [2018-07-24] 4th Bailing Cup, veteran group, round 1
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| Ma Xiaochun 9p | Kobayashi Koichi 9p | B+3.5 | |
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| [2018-07-05] 57th Japanese Judan, preliminary
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| Han Zenki 8p | Kobayashi Koichi 9p | W+8.5 | |
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| [2018-07-02] Shaoxing World Veterans Tournament, final
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| Nie Weiping 9p | Kobayashi Koichi 9p | W+4.5 | |
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| [2018-07-01] Shaoxing World Veterans Tournament, semi-final
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| Kobayashi Koichi 9p | Ma Xiaochun 9p | B+5.5 | |
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| [2018-07-01] Shaoxing World Veterans Tournament, round 1
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| Kobayashi Koichi 9p | Rin Kaiho 9p | B+R | |
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| [2018-06-28] 44th Japanese Meijin, preliminary
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| Xie Yimin 6p | Kobayashi Koichi 9p | B+7.5 | |
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| [2018-06-14] 44th Japanese Gosei, preliminary
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| Ando Kazushige 5p | Kobayashi Koichi 9p | B+6.5 | |
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| [2018-06-07] 57th Japanese Judan, preliminary
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| Cho Riyu 8p | Kobayashi Koichi 9p | W+R | |
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| [2018-05-03] 74th Japanese Honinbo, preliminary
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| Kobayashi Koichi 9p | Kono Takashi 8p | W+8.5 | |
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| [2018-04-12] 8th Japanese Igo Masters Cup, round 1
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| Awaji Shuzo 9p | Kobayashi Koichi 9p | B+0.5 | |
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| [2018-03-27] 2nd China-Japan-Korea Veterans Tournament, round 1
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| Kobayashi Koichi 9p | Nie Weiping 9p | W+14.5 | |
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| [2018-03-15] 74th Japanese Honinbo, preliminary
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| Kobayashi Koichi 9p | Morita Michihiro 9p | B+0.5 | |
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| [2018-03-01] 74th Japanese Honinbo, preliminary
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| Kobayashi Koichi 9p | Sanno Hirotaka 9p | B+R | |
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| [2018-02-22] 57th Japanese Judan, preliminary
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| Kataoka Satoshi 9p | Kobayashi Koichi 9p | W+R | |
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| [2018-02-15] 27th Japanese Ryusei, group B
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| Kobayashi Koichi 9p | Hsu Chiayuan 7p | W+5.5 | |
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| [2018-02-08] 74th Japanese Honinbo, preliminary
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| Ezura Yuichi 8p | Kobayashi Koichi 9p | W+R | |
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| [2018-02-01] 57th Japanese Judan, preliminary
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| Kobayashi Koichi 9p | Kono Mitsuki 8p | B+R | |
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| [2018-01-25] 43rd Japanese Kisei, preliminary
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| Komatsu Hideki 9p | Kobayashi Koichi 9p | B+7.5 | |
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| [2018-01-11] 44th Japanese Tengen, round 1
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| Kobayashi Koichi 9p | Mutsuura Yuta 7p | W+9.5 | |
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