What is the best continuation for Black?

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AJJMJPE (1681) vs. john2001plus (1872)

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

(black to move) 1. c4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Nc3 Bc5 6. Nf3 O-O 7. Bg5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Kg7 11. Nd5 Bb4+ 12. Nc3 d6 13. a3 Bxc3+ 14. bxc3 Bf5 15. f3 Re8 16. e4 Nxe4 17. Bxd8 Nxc3+ 18. Kd2 Nxd1 19. Bxc7 Nb2 20. Kc3 Na4+

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