What is the strongest continuation for Black?

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the_truth_7 (1667) vs. john2001plus (1861)

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

(black to move) 1. d4 Nf6 2. e3 e6 3. Bd3 c5 4. c3 cxd4 5. exd4 d5 6. f4 Nc6 7. Nf3 Be7 8. O-O Ne4 9. Ne5 O-O 10. Nd2 f5 11. Ndf3 Bd6 12. Qe2 Bxe5 13. Nxe5 Nxe5 14. fxe5 Bd7 15. Be3 Qh4 16. Rf3 Be8 17. Rh3 Qg4 18. Qf1 f4 19. Be2 Qg5 20. Bd2 Nxd2 21. Qd1 f3 22. Bf1 Nxf1 23. Qxf1 f2+ 24. Kh1 Qd2 25. Rd3 Qxb2 26. Rdd1 Bb5 27. Rdb1 Bxf1 28. Rxb2 Ba6 29. h3 f1=Q+ 30. Rxf1 Rxf1+

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