1.Nc3 Nf6 2.e4

Black can play:

2...c6 (the safer move),

2...e6 3.Nb5 Bb4 (or 3...Ng4 4.f4 Qf6 5.d4 Bb4+ 6.c3) 4.c3,

2...Ng4 3.f4 c6 4.Nd5 (or 4.Nh3; 4.h3 d5) cxd5 5.Bb5 (or 5.h3) Nc6 6.Nh3 (or 6.Nf3 f6) 6...f6 7.Ng5 Qa5 (or 7...Nf2),

2...d5 3.Nb5 Bg4 (or 3...Ng4 4.f4 c6 5.Nc7+ and white should win) 4.f3 Na6 5.Nxc7 and white is winning.