What is the strongest continuation for White?

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john2001plus (1857) vs. chessBash4 (1670)

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 c6 3. c4 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc7 7. Nc3 e6 8. Nb5 Qa5+ 9. Bd2 Qb6 10. Ne5 a6 11. Rc1 Kd8 12. Qa4 axb5 13. Qxa8 Qd6 14. Qxb7 Nfd7 15. Nxf7+

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Click here for 13. Ba5.