Black
-
1
2
3
4
5
6
7
8
a
b
c
d
e
f
g
h
White
-
1.
...
Nf5
2.
Nh1
...
Avoiding exchanges.
2.
Nxf5
Bxf5
would make it much easier for Black.
2.
...
Qc7
2...
Nd6
3.
g4
3.
g4
Nd6
4.
f4
White keeps the pieces and the chance to launch an attack on the Black King.