Games Between Two Players
Hong Seongji (5 win; 1 loss) vs. On Sojin
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2013-12-01] Year 2013 Korean League
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| On Sojin 7p | Hong Seongji 9p | W+12.5 |  |
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| [2012-07-30] 40th Korean Myeongin, preliminary
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| Hong Seongji 8p | On Sojin 7p | B+R | |
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| [2007-06-08] 12th Korean GS Caltex Cup, league
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| Hong Seongji 5p | On Sojin 4p | B+R | |
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| [2006-06-18] Year 2006 Korean League
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| Hong Seongji 5p | On Sojin 3p | W+R | |
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| [2006-05-08] 40th Korean Wangwi, round 3
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| On Sojin 3p | Hong Seongji 4p | W+0.5 | |
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| [2005-04-28] 5th Korean Osram Cup New Star, game 3
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| On Sojin 1p | Hong Seongji 4p | W+2.5 | |
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