What is the best continuation for White?

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Analysis of john2001plus (1882) vs. Bigveterinarian (2042)

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

(white to move) 1. Nf3 c5 2. e4 e6 3. c3 d5 4. e5 Nc6 5. d4 Nge7 6. a3 Nf5 7. b4 cxd4 8. cxd4 Qb6 9. Bb2 Be7 10. Bd3 O-O 11. Bxf5 exf5 12. O-O Be6 13. Nc3 f6 14. Na4 Qc7 15. Nc5 Bxc5 16. dxc5 fxe5 17. b5 Na5 18. Bxe5 Qxc5 19. Qe1 Nc4 20. Bd4 Qc8 21. Qc3

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