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3.Nc3 … 5...Bb4 6.Nxc6 bxc6 7.Bd2: Petrov Defense line
Petrov Defense line, 11 moves deep. You play Black.
e4
e5
Nf3
Nf6
Nc3
Nc6
d4
exd4
Nxd4
Bb4
Nxc6
bxc6
Bd2
Qe7
Be2
O-O
O-O
Bxc3
Bxc3
Nxe4
Re1
Nxc3