1
2
3
4
5
6
7
h8
g
f
e
d
c
b
a
3.d4: counterattacking on e4

Against 3.d4, IMRosen plays 3…Nxe4 4.Bd3 Nc6: 14 games, 71%.

Recall: after 4.Nf3, which move restores material equality?