Games Between Two Players
Cho U (3 win; 0 loss) vs. Oya Koichi
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2023-07-13] 62nd Japanese Judan, preliminary A
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| Oya Koichi 9p | Cho U 9p | W+R |  |
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| [2006-07-03] 15th Japanese Ryusei, semi-final
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| Cho U 9p | Oya Koichi 9p | B+R | |
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| [2000-11-09] 56th Japanese Honinbo, league
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| Oya Koichi 8p | Cho U 6p | W+R | |
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