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3.Nc3 … 7...Nxe4 8.Qe2 O-O 9.Qxe4: Petrov Defense line
Petrov Defense line, 9 moves deep. You play Black.
e4
e5
Nf3
Nf6
Nc3
Nc6
d4
exd4
Nxd4
Bb4
Nxc6
bxc6
Bc4
Nxe4
Qe2
O-O
Qxe4
Re8