ECO C42 · Petrov's Defense
Petrov's Defense: Cochrane Gambit
The position after 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7.
1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7
Petrov's Defense: Cochrane Gambit is filed under ECO C42, a variation of Petrov's Defense. It is the position after 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7 — 7 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.