Games Between Two Players
Hikosaka Naoto (5 win; 6 loss) vs. Cho Sonjin
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2021-06-10] 77th Japanese Honinbo, preliminary
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| Hikosaka Naoto 9p | Cho Sonjin 9p | B+R |  |
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| [2009-06-27] 5th Japanese Daiwa-Shoken Cup, round 1
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| Cho Sonjin 9p | Hikosaka Naoto 9p | B+3.5 | |
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| [2002-05-16] 27th Japanese Meijin, league
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| Hikosaka Naoto 9p | Cho Sonjin 9p | B+R | |
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| [2000-09-28] 25th Japanese Kisei, league B
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| Cho Sonjin 9p | Hikosaka Naoto 9p | B+R | |
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| [1999-10-28] 4th Samsung Cup, semi-final
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| Cho Sonjin 9p | Hikosaka Naoto 9p | B+R | |
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| [1999-04-05] 54th Japanese Honinbo, challenger decision match
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| Cho Sonjin 9p | Hikosaka Naoto 9p | B+R | |
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| [1999-01-14] 25th Japanese Tengen, round 1
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| Cho Sonjin 9p | Hikosaka Naoto 9p | B+R | |
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| [1999-01-07] 54th Japanese Honinbo, league
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| Hikosaka Naoto 9p | Cho Sonjin 9p | B+R | |
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| [1997-10-02] 53rd Japanese Honinbo, league
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| Cho Sonjin 8p | Hikosaka Naoto 9p | W+3.5 | |
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| [1997-02-06] 52nd Japanese Honinbo, league
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| Cho Sonjin 8p | Hikosaka Naoto 9p | W+7.5 | |
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| [1996-12-02] 6th Japanese Ryusei, group stage
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| Hikosaka Naoto 9p | Cho Sonjin 8p | W+R | |
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