1.Nf3 f6 2.e3 e6 3.Nd4 c6 4.Nb5 Bd6

White can go on with 5.Nc7+ Kf8 6.Qg4 g6 with Nxe6 now or later and is at least a pawn up. The line is still open for further investigation but white is at least clearly better if not winning.