Games lost by Sergey Filippov (Moscow, Russia) as black in this fuseki

4
2
1
35
49bw
+65
=614
-513
?  

1Filippov Sergey - Sirategyan Karen
2Filippov Sergey - Nara Hideki
3Filippov Sergey - Sokolsky Andrey
4Filippov Sergey - Filinov Vladimir
5Filippov Sergey - Fedorkin Oleg