Games Between Two Players
Ko Iso (3 win; 1 loss) vs. Cho Sonjin
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2019-11-21] 46th Japanese Tengen, preliminary
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| Ko Iso 9p | Cho Sonjin 9p | W+R |  |
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| [2016-04-21] 41st Japanese Kisei, league B2
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| Ko Iso 8p | Cho Sonjin 9p | B+R | |
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| [2013-04-08] 68th Japanese Honinbo, league
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| Ko Iso 8p | Cho Sonjin 9p | B+R | |
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| [2010-01-07] 35th Japanese Kisei, preliminary
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| Ko Iso 7p | Cho Sonjin 9p | B+R | |
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