Youhei Yabe (Japan, Yokohama) prefer positions after 5 moves

All years
2
14
53
1bw
+  
=  
- 1
?  
2
51
4
3
1bw
+  
=  
-1 
?  
3
42
51
1bw
+  
=  
- 1
?  
42
1
53
1bw
+  
=  
- 1
?