3.Nc3 … 7...Bxc3+ 8.bxc3 Nxe4 9.Bd3: Petrov Defense line

Petrov Defense line, 11 moves deep. You play Black.

1. e4
2. e5
3. Nf3
4. Nf6
5. Nc3
6. Nc6
7. d4
8. exd4
9. Nxd4
10. Bb4
11. Nxc6
12. bxc6
13. a3
14. Bxc3+
15. bxc3
16. Nxe4
17. Bd3
18. O-O
19. Bxe4
20. Re8
21. f3
22. f5