What is the best continuation for Black?

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Analysis of tspaper (1540) vs. john2001plus (1818), 900+10

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

(black to move) 1. d4 Nf6 2. Bf4 c5 3. e3 cxd4 4. exd4 Qb6 5. Nf3 Qxb2 6. Nbd2 Nd5 7. Rb1 Qxa2 8. Ra1 Qb2 9. Rb1 Qa3 10. Ra1 Qb4 11. Rb1 Qa4 12. Ra1 Qc6 13. Bxb8 Rxb8 14. Rxa7 b5

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