Games Between Two Players
Kato Masao (4 win; 1 loss) vs. Oyama Kunio
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [1992-03-05] 17th Japanese Gosei, round 2
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| Oyama Kunio 9p | Kato Masao 9p | W+R |  |
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| [1990-10-14] 38th Japanese NHK Cup, round 2
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| Oyama Kunio 9p | Kato Masao 9p | W+9.5 | |
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| [1985-04-11] 24th Japanese Judan, preliminary
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| Oyama Kunio 9p | Kato Masao 9p | B+2.5 | |
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| [1984-05-31] 10th Japanese Tengen, round 2
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| Kato Masao 9p | Oyama Kunio 9p | B+R | |
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| [1983-10-13] 9th Japanese Gosei, round 1
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| Kato Masao 9p | Oyama Kunio 9p | B+R | |
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