Center Crash: Ruy Lopez (Spanish Opening) line

Engine-verified opening line.

1. e4
2. e5
3. Nf3
4. Nc6
5. Bb5
6. a6
7. Ba4
8. Nf6
9. d4
10. exd4
11. O-O
12. Be7
13. e5
14. Nd5
15. Nxd4
16. Nxd4
17. Qxd4
18. Nb6
19. Bb3
20. O-O
21. Bf4