What is the strongest continuation for Black?

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Analysis of Gusev (1845) vs. john2001plus (1920)

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

(black to move) 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bh4 g5 7. Bg3 Ne4 8. Nge2 c5 9. a3 Bxc3+ 10. bxc3 Nc6 11. f3 Nxg3 12. Nxg3 cxd4 13. cxd4 Qa5+ 14. Qd2 Qxd2+ 15. Kxd2 Nxd4 16. h4 Rg8 17. Rb1 gxh4 18. Ne2 Nxe2 19. Kxe2 Rg5 20. f4 Rg4 21. Rb4 b6 22. Kf2 a5 23. Rd4 Ba6 24. Bxa6 Rxa6 25. Rb1 Ra8 26. Rxb6 Rc8 27. Rb2 Rc3

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