Games Between Two Players
Kobayashi Koichi (11 win; 16 loss) vs. Ishida Yoshio
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2022-03-03] 47th Japanese Kisei, preliminary
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+8.5 |  |
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| [2019-05-30] 9th Japanese Igo Masters Cup, round 2
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+3.5 | |
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| [2012-12-20] 38th Japanese Kisei, preliminary
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | B+R | |
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| [2011-06-25] 1st Japanese Igo Masters Cup, semi-final
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+4.5 | |
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| [1994-06-20] 4th Japanese Ryusei, group stage
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | B+2.5 | |
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| [1992-11-19] 48th Japanese Honinbo, league
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | B+0.5 | |
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| [1991-10-06] 39th Japanese NHK Cup, round 2
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+0.5 | |
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| [1990-09-22] 10th Japanese NEC Cup, round 2
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | B+R | |
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| [1988-08-11] 13th Japanese Meijin, league
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | B+2.5 | |
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| [1987-12-19] 7th Japanese NEC Cup, round 2
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+R | |
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| [1986-05-01] 11th Japanese Gosei, round 3
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+R | |
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| [1985-12-04] 11th Japanese Tengen, title match #3
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+R | |
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| [1985-11-29] 11th Japanese Tengen, title match #2
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | B+1.5 | |
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| [1985-11-16] 11th Japanese Tengen, title match #1
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+R | |
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| [1984-03-25] 16th Japanese Hayago Championship, final 3
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+35.5 | |
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| [1984-03-11] 16th Japanese Hayago Championship, final 2
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+3.5 | |
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| [1984-02-26] 16th Japanese Hayago Championship, final 1
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+15.5 | |
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| [1983-07-14] 22nd Japanese Judan, winner section round 1
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+4.5 | |
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| [1983-03-06] 15th Japanese Hayago Championship, final 2
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | B+0.5 | |
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| [1983-02-20] 15th Japanese Hayago Championship, final 1
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+R | |
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| [1982-04-10] 2nd Japanese NEC Cup, round 1
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+9.5 | |
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| [1980-08-28] 28th Japanese Oza, semi-final
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | B+R | |
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| [1980-02-21] 35th Japanese Honinbo, league
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| Ishida Yoshio 9p | Kobayashi Koichi 9p | W+R | |
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| [1979-03-22] 34th Japanese Honinbo, league
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| Kobayashi Koichi 8p | Ishida Yoshio 9p | W+R | |
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| [1978-05-04] 3rd Japanese Gosei, league
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| Ishida Yoshio 9p | Kobayashi Koichi 8p | B+R | |
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| [1978-04-13] 33rd Japanese Honinbo, league
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| Kobayashi Koichi 8p | Ishida Yoshio 9p | W+R | |
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| [1976-09-23] 2nd Japanese Gosei, preliminary
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| Kobayashi Koichi 7p | Ishida Yoshio 9p | B+2.5 | |
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