Games Between Two Players
Ko Iso (4 win; 0 loss) vs. Ogata Masaki
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2014-05-04] 62nd Japanese NHK Cup, round 1
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| Ogata Masaki 9p | Ko Iso 8p | W+R |  |
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| [2011-12-22] 50th Japanese Judan, semi-final
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| Ko Iso 8p | Ogata Masaki 9p | B+R | |
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| [2008-12-08] 18th Japanese Ryusei, group stage
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| Ko Iso 7p | Ogata Masaki 9p | B+R | |
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| [2006-12-19] 2nd Japanese Daiwa-Shoken Cup, preliminary
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| Ko Iso 7p | Ogata Masaki 9p | B+R | |
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