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

25
1
3
4
3bw
+1 
=1 
-1 
?  

1Yamamoto Yasuhiro - Samotsvetov Igor
2Yamamoto Yasuhiro - Chung Chun-Chih
3Yamamoto Yasuhiro - Maruyama Yasushi