Games Between Two Players
Kobayashi Koichi (2 win; 2 loss) vs. Han Zenki
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2020-02-27] 46th Japanese Gosei, preliminary
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| Kobayashi Koichi 9p | Han Zenki 8p | W+6.5 |  |
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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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| [2011-09-01] 38th Japanese Tengen, preliminary
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| Han Zenki 7p | Kobayashi Koichi 9p | W+0.5 | |
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| [2004-09-02] 60th Japanese Honinbo, preliminary
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| Han Zenki 7p | Kobayashi Koichi 9p | B+3.5 | |
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