Games Between Two Players
Hane Yasumasa (5 win; 5 loss) vs. Iwata Tatsuaki
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [1989-10-05] 30th Japanese Okan, challenger decision match
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| Iwata Tatsuaki 9p | Hane Yasumasa 9p | B+3.5 |  |
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| [1987-04-16] 28th Japanese Okan, semi-final
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| Iwata Tatsuaki 9p | Hane Yasumasa 9p | W+R | |
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| [1986-08-07] 27th Japanese Okan, semi-final
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| Iwata Tatsuaki 9p | Hane Yasumasa 9p | W+R | |
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| [1985-10-31] 26th Japanese Okan, challenger decision match
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| Iwata Tatsuaki 9p | Hane Yasumasa 9p | B+0.5 | |
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| [1983-10-12] 24th Japanese Okan, challenger decision match
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| Hane Yasumasa 9p | Iwata Tatsuaki 9p | B+R | |
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| [1982-09-16] 23rd Japanese Okan, challenger decision match
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| Hane Yasumasa 9p | Iwata Tatsuaki 9p | B+R | |
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| [1982-09-09] 38th Japanese Honinbo, preliminary
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| Hane Yasumasa 9p | Iwata Tatsuaki 9p | W+0.5 | |
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| [1979-10-11] 20th Japanese Okan, title match
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| Iwata Tatsuaki 9p | Hane Yasumasa 8p | B+5.5 | |
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| [1978-09-07] 19th Japanese Okan, challenger decision match
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| Hane Yasumasa 8p | Iwata Tatsuaki 9p | B+0.5 | |
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| [1974-07-04] 22nd Japanese Oza, round 1
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| Hane Yasumasa 8p | Iwata Tatsuaki 9p | W+2.5 | |
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