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

23
41
5
7bw
+21
=  
-22
?  

1Filippov Sergey - Petrovsky Dmitri
2Filippov Sergey - Skuridin Alexey
3Filippov Sergey - Filinov Vladimir
4Filippov Sergey - Fedorkin Oleg