Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nf3/4...Nxe4

=Petrov's Defence= We are in the main line of the Petrov's Defence. Black will still have a hard time to equalize.

=Theory Table= .

'''1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4'''