Games played by Akihiro Koyama (Tokyo, Japan) in this fuseki

425
1
3
4bw
+ 1
= 1
-2 
?  

1Koyama Akihiro - Tomobe Katsuhiro
2Koyama Akihiro - Iwano Fumio
3Fujikawa Masaki - Koyama Akihiro
4Fujita Maiko - Koyama Akihiro