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...d5/8. dxe5/8...Be6/9. Nbd2

=Ruy Lopez Open Defence=

The old line goes: 9...Nc5 10. c3 d4 11. cxd4 Nxd4. The new variation goes: 11.Ng5!? Qxg5. Black is thought to equalize in both lines.