Games played by Yasuhiro Yamamoto (Hamamatsu, Japan) in this fuseki

5
42
1
3
7bw
+2 
= 1
- 4
?  

1Yamamoto Yasuhiro - Mano Yoshihisa
2Miyagawa Junzo - Yamamoto Yasuhiro
3Maruyama Yasushi - Yamamoto Yasuhiro
4Yamamoto Yasuhiro - Kato Daisuke
5Ishitani Shin-ichi - Yamamoto Yasuhiro
6Takazawa Nagayoshi - Yamamoto Yasuhiro
7Takazawa Nagayoshi - Yamamoto Yasuhiro