Games Between Two Players
Kobayashi Koichi (4 win; 4 loss) vs. Ko Iso
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2023-08-24] 79th Japanese Honinbo, preliminary B
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| Kobayashi Koichi 9p | Ko Iso 9p | W+6.5 |  |
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| [2016-12-01] 65th Japanese Oza, preliminary
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| Ko Iso 8p | Kobayashi Koichi 9p | B+12.5 | |
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| [2016-03-31] 42nd Japanese Gosei, preliminary
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| Ko Iso 8p | Kobayashi Koichi 9p | W+1.5 | |
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| [2009-11-26] 36th Japanese Tengen, preliminary
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| Ko Iso 7p | Kobayashi Koichi 9p | W+R | |
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| [2008-08-30] 4th Japanese Daiwa-Shoken Cup, round 2
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| Ko Iso 7p | Kobayashi Koichi 9p | W+R | |
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| [2008-01-31] 34th Japanese Tengen, round 1
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| Kobayashi Koichi 9p | Ko Iso 7p | W+R | |
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| [2005-10-20] 45th Japanese Judan, preliminary
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| Kobayashi Koichi 9p | Ko Iso 4p | B+R | |
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| [2005-03-03] 61st Japanese Honinbo, preliminary
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| Kobayashi Koichi 9p | Ko Iso 3p | W+0.5 | |
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