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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 | |
 [2024-09-09] 2nd Nongshim Baeksansoo Cup, game 5
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| Kobayashi Koichi 9p | Rui Naiwei 9p | W+R |  |
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| [2024-08-22] 51st Japanese Tengen, preliminary B
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| Kobayashi Koichi 9p | Suzuki Ayumi 7p | B+2.5 | |
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| [2024-06-12] 5th Sinan International Veteran's Tournament, round 2
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| Kobayashi Koichi 9p | Lee Changho 9p | W+8.5 | |
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| [2024-06-12] 5th Sinan International Veteran's Tournament, round 1
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| Kobayashi Koichi 9p | Cho Hunhyun 9p | B+R | |
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| [2024-06-06] 73rd Japanese Oza, preliminary C
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| Chang Rueijie 6p | Kobayashi Koichi 9p | B+R | |
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| [2024-05-16] 50th Japanese Gosei, preliminary B
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| Takanashi Seiken 9p | Kobayashi Koichi 9p | B+R | |
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| [2024-05-02] 33rd Japanese Ryusei, group B
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| Kobayashi Koichi 9p | Adachi Toshimasa 7p | W+4.5 | |
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| [2024-04-15] 50th Japanese Gosei, preliminary C
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| Muramatsu Ryuichi 8p | Kobayashi Koichi 9p | W+R | |
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| [2024-03-11] 3rd Japanese Teikei Cup Legend Tournament, round 2
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| Kobayashi Koichi 9p | Ishigure Ikuro 9p | W+6.5 | |
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| [2024-02-01] 63rd Japanese Judan, preliminary B
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| Kobayashi Koichi 9p | Terayama Rei 6p | W+R | |
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| [2023-11-24] 2023 Longhua Cup, round 1
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| Kobayashi Koichi 9p | Yoo Changhyuk 9p | W+2.5 | |
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| [2023-11-16] 63rd Japanese Judan, preliminary C
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| Chang Rueijie 6p | Kobayashi Koichi 9p | W+4.5 | |
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| [2023-10-14] 5th Nie Weiping Cup CJK Weiqi Masters Tournament, round 1
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| Kobayashi Koichi 9p | Lee Changho 9p | W+8.5 | |
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| [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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| [2023-07-03] 49th Japanese Gosei, preliminary B
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| Kawahara Yu 1p | Kobayashi Koichi 9p | B+R | |
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| [2023-03-23] 62nd Japanese Judan, preliminary B
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| Kobayashi Koichi 9p | Chang Rueijie 6p | W+3.5 | |
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| [2023-02-02] 2nd Japanese Teikei Cup Legend Tournament, round 3
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| Kobayashi Koichi 9p | Yamashiro Hiroshi 9p | W+4.5 | |
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| [2023-01-19] 2nd Japanese Teikei Cup Legend Tournament, round 2
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| Kobayashi Koichi 9p | Hashimoto Yujiro 9p | B+0.5 | |
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| [2022-12-15] 48th Japanese Kisei, preliminary
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| Chinen Kaori 6p | Kobayashi Koichi 9p | W+2.5 | |
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| [2022-12-08] 49th Japanese Tengen, preliminary A
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| Kobayashi Koichi 9p | Ohashi Hirofumi 7p | W+5.5 | |
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| [2022-06-22] 3rd Sinan International Veteran's Tournament, semi-final
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| O Meien 9p | Kobayashi Koichi 9p | B+R | |
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| [2022-06-21] 3rd Sinan International Veteran's Tournament, round 2
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| Kobayashi Koichi 9p | Yu Bin 9p | B+4.5 | |
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| [2022-06-21] 3rd Sinan International Veteran's Tournament, round 1
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| Choi Kyubyeong 9p | Kobayashi Koichi 9p | W+R | |
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| [2022-05-09] 31st Japanese Ryusei, group A
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| Ogaki Yusaku 9p | Kobayashi Koichi 9p | B+6.5 | |
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| [2022-03-03] 47th Japanese Kisei, preliminary
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| Kobayashi Koichi 9p | Ishida Yoshio 9p | W+8.5 | |
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| [2022-02-03] 1st Japanese Teikei Cup Legend Tournament, round 3
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| Kobayashi Koichi 9p | Aoki Kikuyo 8p | W+9.5 | |
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| [2022-01-20] 1st Japanese Teikei Cup Legend Tournament, round 2
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| Sonoda Yasutaka 9p | Kobayashi Koichi 9p | W+R | |
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| [2021-12-21] 2nd Sinan International Veteran's Tournament, round 1
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| Kim Yeonghwan 9p | Kobayashi Koichi 9p | B+5.5 | |
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| [2021-12-02] 48th Japanese Tengen, preliminary A
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| Kobayashi Koichi 9p | Terayama Rei 6p | B+R | |
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| [2021-11-25] 70th Japanese Oza, preliminary B
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| Kobayashi Koichi 9p | Oomote Takuto 3p | W+R | |
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