What is the best continuation for White?

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john2001plus (1839) vs. aherring74 (1963)

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

(white to move) 1. Nf3 f5 2. e4 fxe4 3. Ng5 e5 4. d3 e3 5. Bxe3 Nc6 6. Nc3 Nf6 7. Be2 Bb4 8. Nge4 O-O 9. Nxf6+ Qxf6 10. O-O Bxc3 11. bxc3 d6 12. Qd2 Bd7 13. f4 Rae8 14. Bf3 Kh8 15. Bd5 Qe7 16. Rab1 Nd8 17. Bxb7 Nxb7 18. Rxb7 exf4 19. Bxf4

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