What is the best defense for Black?

Itsyourturn.com, ?
Analysis of Coffey, John (2001) vs. Jumper (1700)

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

(black to move) 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 O-O 6. Rc1 c6 7. e3 h6 8. Bxf6 Bxf6 9. Bd3 Nd7 10. O-O e5 11. cxd5 exd4 12. Nxd4 cxd5 13. Nxd5 Bxd4 14. exd4 Nf6 15. Nc7 Rb8 16. Re1 a6 17. d5 Bg4 18. f3 Bh5 19. g4 Bg6 20. Bxg6 fxg6 21. Ne6 Qb6+ 22. Kg2 Rfc8 23. Rxc8+ Rxc8 24. Qd2 Qd6

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Click here for 24. d6.