What is the best continuation for White?

G/10, Columbus Chess Club
Coffey, John vs. Bemke, James

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

(white to move) 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 Be7 10. e5 Nd5 11. Ne4 a6 12. O-O c5 13. dxc5 Nxc5 14. Nxc5 Bxc5 15. Bg5 Qb6 16. Rc1 O-O 17. Bxh7+ Kxh7 18. Qc2+ Kg8 19. Qxc5 Qxc5 20. Rxc5

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Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight