The Underrated Exchange Slav: Queen's Gambit line

Queen's Gambit line, 13 moves deep. You play White.

1. d4
2. d5
3. c4
4. c6
5. cxd5
6. cxd5
7. Bf4
8. Nc6
9. e3
10. Nf6
11. Nc3
12. a6
13. Be2
14. Bf5
15. Nf3
16. e6
17. Qb3
18. Na5
19. Qa4+
20. Nc6
21. Ne5
22. Qb6
23. Nxc6
24. bxc6
25. O-O