What is the strongest continuation for Black?

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Gusev (1786) vs. john2001plus (1933)

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

(black to move) 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 b6 6. a3 Bxc3+ 7. bxc3 Bb7 8. Nf3 d6 9. O-O Nbd7 10. Nd2 e5 11. d5 Nc5 12. Bc2 e4 13. Nb3 Qe7 14. Nxc5 bxc5 15. f3 Rfe8 16. Bd2 Ba6 17. Qe2 exf3 18. gxf3 Nxd5 19. Kh1 Nxe3 20. Rae1 Nxf1 21. Qxe7 Rxe7 22. Rxe7 Nxd2

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