Games played by Jun Koyama (Tokyo, Japan) in this fuseki

425
1
3
6bw
+11
=1 
-21
?  

1Koyama Jun - Nakayama Tomoharu
2Okabe Hiroshi - Koyama Jun
3Koyama Jun - Liu Yang
4Iwano Fumio - Koyama Jun
5Koyama Jun - Chigira Makoto
6Koyama Jun - Sushkov Vladimir