What is the strongest continuation for White?

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Analysis of 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. a4 Qd8 11. a5 a6 12. Nc3

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