How does Black save his queen?

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taechess (1458) vs. john2001plus (1695)

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

(black to move) 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 Nh6 7. Bxh6 Qxb2 8. Be3 Qxa1 9. Qc2 cxd4 10. Nxd4 Bc5 11. Nb3 Nb4 12. Bb5+ Kd8 13. Nxa1 Nxc2+ 14. Nxc2 Bxe3 15. Nxe3

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Pawn promotion:
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