Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Nxe4/6. d4/6...b5/7. Bb3/7...d5

=Ruy Lopez Open Defence=

Black's position is now reasonable. White must reclaim the lost pawn now or have nothing to show for its loss. As 8. Nxe5 would allow Black to exchange off the knight that is currently obstructing his c-pawn, 8. dxe5 is preferable. 8. Re1 would grant Black equality.