Games Between Two Players
Ko Iso (4 win; 5 loss) vs. Cho Chikun
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2019-05-09] 44th Japanese Kisei, league B2
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| Cho Chikun 9p | Ko Iso 8p | B+R |  |
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| [2018-11-01] 44th Japanese Gosei, round 1
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| Cho Chikun 8p | Ko Iso 8p | W+11.5 | |
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| [2018-07-26] 43rd Japanese Kisei, league A
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| Ko Iso 8p | Cho Chikun 9p | W+R | |
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| [2010-11-04] 49th Japanese Judan, loser section semi-final
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| Cho Chikun 9p | Ko Iso 7p | W+R | |
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| [2010-04-19] 19th Japanese Ryusei, group stage
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| Ko Iso 7p | Cho Chikun 9p | W+R | |
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| [2009-05-25] 18th Japanese Ryusei, round 1
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| Ko Iso 7p | Cho Chikun 9p | B+R | |
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| [2008-11-27] 47th Japanese Judan, loser section semi-final
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| Ko Iso 7p | Cho Chikun 9p | B+2.5 | |
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| [2008-02-14] 33rd Japanese Meijin, league
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| Cho Chikun 9p | Ko Iso 7p | B+R | |
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| [2007-12-06] 33rd Japanese Gosei, round 2
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| Ko Iso 7p | Cho Chikun 9p | W+2.5 | |
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