Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...f5/4. Nc3/4...fxe4/5. Nxe4/5...d5/6. Nxe5/6...dxe4/7. Nxc6/7...Qd5/8. c4/8...Qd6/9. Nxa7/9...Bd7

White's two threats in this position are Qh5+ and Bxd7+. It doesn't really matter whether White plays first, unless she wants to leave out Qh5+ entirely and just save the a7-knight with 10.Bxd7 Qxd7 11.Nb5. But that plan has a terrible score for White, despite the two extra pawns, because of Black's bind on the d-file and easy development.
 * 10. Bxd7+, or
 * 10. Qh5+