What is the best continuation for Black?

ICC tourney 1535 (12 3), Internet Chess Club
Analysis of john2001plus (1712) vs. ROWLAND (1540), 720+3

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

(black to move) 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. g4 Nc6 7. d5 Ne5 8. g5 Ne8 9. h4 f6 10. f4 Nf7 11. Qc2 e5 12. dxe6 e.p. Bxe6 13. f5 Bd7 14. Nf3 Ne5 15. Nxe5 dxe5 16. Be3 gxf5 17. O-O-O f4 18. Bc5 Nd6 19. Bxd6 cxd6 20. Rxd6 Qe7 21. Rhd1 Bc6 22. Nd5 Qxd6 23. Nxf6+ Rxf6 24. Rxd6 Rxd6

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Pawn promotion:
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