Games played by Roman Berezin (Saint Petersburg, Russia) in this fuseki

5
2
13
4
5bw
+21
=  
-2 
?  

1Berezin Roman - Piddubny Konstantin
2Berezin Roman - Vershinin Pavel
3Berezin Roman - Volkov Sergey
4Berezin Roman - Murumaa Mathias
5Filinov Vladimir - Berezin Roman