Games won by Konstantin Nikonov (Elektrostal, Russia) as black in this fuseki

5
43
2
1
12bw
+43
= 1
-4 
?  

1Nikonov Konstantin - Brusnikin Alexander
2Nikonov Konstantin - Azov Dmitriy
3Nikonov Konstantin - Ermakov Vladimir
4Nikonov Konstantin - Bashirov Rustam