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

3
24
15
4bw
+2 
=1 
- 1
?  

1Oosumi Yuuki - Hasegawa Kazuto
2Oosumi Yuuki - Tamada Yoichi
3Oosumi Yuuki - Iio Yoshihiro