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

2
1
35
4
8bw
+31
= 2
-2 
?  

1Oosumi Yuuki - Mitsumori Masao
2Oosumi Yuuki - Sagara Takashi
3Oosumi Yuuki - Hata Masayuki
4Oosumi Yuuki - Fukui Nobuhiro
5Oosumi Yuuki - Nakamura Shigeru