Cool Sideline vs Triangle Slav: Queen's Gambit line

Queen's Gambit line, 10 moves deep. You play White.

1. d4
2. d5
3. c4
4. e6
5. Nc3
6. c6
7. e4
8. dxe4
9. Nxe4
10. Bb4+
11. Nc3
12. Nf6
13. Nf3
14. O-O
15. a3
16. Bxc3+
17. bxc3
18. Nbd7
19. Be2