What is the best continuation for Black?

ICC tourney 1447 (12 3), Internet Chess Club
Analysis of Heian (1526) vs. john2001plus (1763)

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. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Bd7 8. O-O Nxd4 9. Nxd4 Qxd4 10. Nc3 a6 11. Be3 Qxe5 12. Re1 Nf6 13. Qf3 Bd6 14. g3 d4 15. Bf4 Qc5 16. Ne2 Bc6 17. Bxd6 Qxd6 18. Qf4 Qd5 19. f3 Rd8 20. Rf1 e5

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