Games played by Taizan Isobe (Omiya, Japan) in this fuseki

4
52
1
3
4bw
+2 
=1 
-1 
?  

1Isobe Taizan - Suzuki Rin
2Isobe Taizan - Fukui Nobuhiro
3Isobe Taizan - Kudomi Takahiro
4Isobe Taizan - Okabe Hiroshi