Games Between Two Players
Kobayashi Koichi (4 win; 2 loss) vs. Hashimoto Utaro
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [1982-02-11] 37th Japanese Honinbo, league
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| Kobayashi Koichi 9p | Hashimoto Utaro 9p | B+7.5 |  |
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| [1980-04-10] 5th Japanese Meijin, league
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| Kobayashi Koichi 9p | Hashimoto Utaro 9p | W+2.5 | |
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| [1979-08-30] 27th Japanese Oza, semi-final
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| Hashimoto Utaro 9p | Kobayashi Koichi 8p | W+R | |
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| [1978-04-20] 3rd Japanese Gosei, league
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| Kobayashi Koichi 8p | Hashimoto Utaro 9p | B+R | |
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| [1977-10-13] 2nd Japanese Kisei, round 1
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| Hashimoto Utaro 9p | Kobayashi Koichi 8p | W+0.5 | |
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| [1974-02-05] 11th Japanese Pro Best Ten, round 2
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| Hashimoto Utaro 9p | Kobayashi Koichi 6p | B+R | |
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