What is the strongest continuation for Black?

ICC tourney 1543 (12 3), Internet Chess Club
Analysis of IAlwaysWin (1732) vs. john2001plus (1731)

1 2 3 4 5 6 7 8 h g f e d c b a 0

(black to move) 1. Nf3 Nf6 2. e3 e6 3. b3 b6 4. Bb2 Bb7 5. c4 c5 6. Be2 Nc6 7. O-O Be7 8. Nc3 O-O 9. d3 d5 10. Rc1 d4 11. exd4 cxd4 12. Nb5 e5 13. Nd2 a6 14. Na3 Nd7 15. Bf3 Nc5 16. Qe2 Qd7 17. Nc2 a5 18. Rcd1 Nb4 19. Bxb7 Qxb7 20. Nxb4 axb4 21. Qxe5 Bf6 22. Qf5 Rxa2

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