What is the strongest continuation for White?

Casual Game, https://itsyourturn.com
John Coffey vs. Alexander Netipanov

8 7 6 5 4 3 2 1 a b c d e f g h 0

(white to move) 1. d4 d5 2. c4 e6 3. Nf3 h6 4. Nc3 Nf6 5. Bf4 Bb4 6. e3 Nc6 7. Rc1 a6 8. Bd3 dxc4 9. Bxc4 b5 10. Bd3 O-O 11. O-O Bb7 12. Ne4 Be7 13. Nxf6+ Bxf6 14. Be4 Qd7 15. Nd2 Be7 16. Qf3 e5 17. Bg3 Nxd4 18. exd4 Bxe4 19. Qxe4 Qxd4 20. Qxd4 exd4 21. Rxc7

[ Flip the board | Reset | Options… ] Play online chess

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight