Develop and castle: Scotch Game line

Repeat the setup. If Black exchanges knights, recapture with your queen, develop your pieces and castle.

1. e4
2. e5
3. Nf3
4. Nc6
5. d4
6. exd4
7. Nxd4
8. Nxd4
9. Qxd4
10. d6
11. Nc3
12. Nf6
13. Bg5
14. Be7
15. O-O-O