Games played by Koji Maruta (Tokyo, Japan) in this fuseki

2
14
5
3
4bw
+2 
=  
- 2
?  

1Maruta Koji - Matsuoka Teruo
2Maruta Koji - Kusajima Masato
3Kusajima Masato - Maruta Koji
4Ishitani Shin-ichi - Maruta Koji