Games Between Two Players
O Rissei (5 win; 3 loss) vs. Ogata Masaki
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2014-03-13] 23rd Japanese Ryusei, group stage
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| O Rissei 9p | Ogata Masaki 9p | B+R |  |
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| [2011-04-14] 50th Japanese Judan, preliminary
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| O Rissei 9p | Ogata Masaki 9p | W+R | |
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| [2009-07-04] 5th Japanese Daiwa-Shoken Cup, round 1
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| Ogata Masaki 9p | O Rissei 9p | W+1.5 | |
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| [2008-07-05] 4th Japanese Daiwa-Shoken Cup, round 1
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| Ogata Masaki 9p | O Rissei 9p | W+R | |
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| [2008-06-05] 64th Japanese Honinbo, preliminary
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| Ogata Masaki 9p | O Rissei 9p | B+R | |
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| [1994-07-03] 42nd Japanese NHK Cup, round 1
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| O Rissei 9p | Ogata Masaki 9p | W+0.5 | |
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| [1988-07-18] 1st Japanese IBM Hayago Open, round 4
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| Ogata Masaki 7p | O Rissei 8p | W+R | |
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| [1986-09-20] 2nd Japanese NEC Shunei, round 2
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| Ogata Masaki 6p | O Rissei 8p | W+2.5 | |
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