What is the correct move for Black?

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Analysis of Jahonas (2245) vs. john2001plus (1834)

1 2 3 4 5 6 7 8 h g f e d c b a -9

(black to move) 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Nbxd2 O-O 8. O-O d6 9. Rc1 Nbd7 10. Qc2 c5 11. dxc5 Nxc5 12. Rfd1 Rc8 13. Qb1 Nfe4 14. b4 Nxd2 15. Nxd2 Bxg2 16. Kxg2 Nb7 17. Ne4 Qc7 18. Qd3 Rfd8 19. Ng5 g6 20. Qd4 e5 21. Qh4 f5 22. e4 Qe7 23. exf5 gxf5 24. Qh6 Rf8 25. h4 Rf6 26. Qh5 h6 27. Nf3 Qf7 28. Qxf7+ Rxf7 CHECK!

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