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

5
42
1
3
5bw
+2 
=  
-21
?  

1Yamamoto Yasuhiro - Saito Syuichi
2Yamamoto Yasuhiro - Suzuki Junichiro
3Tatematsu Hikaru - Yamamoto Yasuhiro
4Yamamoto Yasuhiro - Maruyama Yasushi
5Yamamoto Yasuhiro - Suzuki Junichiro