Games lost by Konstantin Nikonov (Elektrostal, Russia) in this fuseki

5
43
2
1
12bw
+43
= 1
-4 
?  

1Nikonov Konstantin - Biryukov Mikhail
2Nikonov Konstantin - Mikhailov Alexander
3Nikonov Konstantin - Gluhovsky Leonid
4Nikonov Konstantin - Bobkov Evgeniy