Games played by Yuuki Oosumi (Moriyama, Japan) in this fuseki

2
41
53
4bw
+2 
=  
-11
?  

1Oosumi Yuuki - Maruta Hiroki
2Oosumi Yuuki - Oll Aivo
3Iio Yoshihiro - Oosumi Yuuki
4Oosumi Yuuki - Kashihara Akihiko