C40 - 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 - Petrov's Defense: Modern Attack, Center Attack

Petrov’s Defense: Modern Attack, Center Attack (C40)
Coups: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5