1.Na3 e6

White can play:

2.Nf3 Qf6 3.Nc4 Qd4 (or 3...Bb4) 4.Nxd4 Nf6 5.e4 (or 5.f3) Ng4 6.f4 g6 7.Bb5,

2.e3 b5 (or 2...Qh4, 2...Nh6) 3.Qf3 (or 3.Nf3).