Games Between Two Players
Kato Masao (7 win; 2 loss) vs. Cho Sonjin
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2004-04-01] 59th Japanese Honinbo, league
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| Cho Sonjin 9p | Kato Masao 9p | B+3.5 |  |
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| [2002-03-14] 57th Japanese Honinbo, league
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| Kato Masao 9p | Cho Sonjin 9p | B+4.5 | |
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| [2002-03-07] 27th Japanese Meijin, league
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| Kato Masao 9p | Cho Sonjin 9p | B+1.5 | |
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| [2002-01-06] 49th Japanese NHK Cup, round 3
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| Kato Masao 9p | Cho Sonjin 9p | B+2.5 | |
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| [2001-04-17] 10th Japanese Ryusei, group stage
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| Kato Masao 9p | Cho Sonjin 9p | B+R | |
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| [2001-02-26] 26th Japanese Meijin, league
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| Cho Sonjin 9p | Kato Masao 9p | W+3.5 | |
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| [2000-04-16] 33rd Japanese Hayago Championship, round 1
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| Kato Masao 9p | Cho Sonjin 9p | B+R | |
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| [1998-04-02] 53rd Japanese Honinbo, league
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| Cho Sonjin 8p | Kato Masao 9p | B+R | |
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| [1996-10-17] 52nd Japanese Honinbo, league
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| Cho Sonjin 8p | Kato Masao 9p | W+R | |
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