What is the best defense for Black?

ICC tourney 1252 (12 3), Internet Chess Club
Analysis of Rluis (1668) vs. yoshi (1648)

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

(black to move) 1. e4 e6 2. b3 d5 3. Bb2 dxe4 4. Nc3 Nf6 5. Qe2 Be7 6. O-O-O b6 7. Nxe4 Bb7 8. f3 O-O 9. g4 Nbd7 10. h4 Nxe4 11. fxe4 Nf6 12. Bg2 e5 13. g5 Nd7 14. Nf3 Bd6 15. h5 Qe7 16. g6 h6 17. Nh4 f6 18. Nf5 Qe8 19. Bh3 Nc5 20. Rhg1 Bc8

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Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight