What is the strongest continuation for Black?

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Analysis of SpeedyChess11 (1739) vs. john2001plus (1853)

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

(black to move) 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 cxd4 7. cxd4 Nh6 8. Nc3 Nf5 9. Na4 Qa5+ 10. Nc3 Qb6 11. Na4 Qa5+ 12. Kf1 h5 13. h4 b5 14. Nc3 b4 15. Na4 Nfxd4 16. Nxd4 Nxd4 17. Qxd4 Qxa4 18. Be3 Ba6 19. b3 Bxe2+ 20. Kxe2 Qb5+ 21. Kd2 Be7 22. Rac1 Kd7 23. Rc2 Rhc8 24. Rhc1 Qb7 25. Rxc8 Rxc8 26. Rxc8 Kxc8 27. Qxa7 Qxa7 28. Bxa7 Kb7 29. Bd4 Bxh4

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