Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nxf7/4...Kxf7/5. d4/5...g6

= Petrov's Defence: Cochrane Gambit =

g6 prepares a fianchetto. Black will leave the e file open and builds another kind of defence with the bishop on g7. But we may wonder if this will resist a White pawn advance on the king side. Most games have continued with the natural developing move, Nc3.

Theory table
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1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4 g6