Another fighting draw in game 2

[Event “Women’s WCC 2011”]
[Site “Tirana”]
[Date “2011.11.15”]
[Round “2”]
[White “Hou, Yifan”]
[Black “Koneru, Humpy”]
[Result “1/2-1/2”]
[PlyCount “84”]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 O-O 8. Qd2 Qe8 9. O-O-O Qa4 10. Kb1 Nc6 11. h4 Be6 12. b3 Qa5 13. Nd4 Nxd4 14. cxd4 Qxd2 15. Rxd2 d5 16. h5 h6 17. Bd3 a5 18. a4 Bb4 19. Rdd1 Bc3 20. Rh4 c6 21. Bc1 Bd7 22. Bb2 Bb4 23. Ka2 Rfe8 24. Rhh1 b5 25. c3 Bf8 26. axb5 cxb5 27. Rde1 Bd6 28. Ba3 Rxe1 29. Rxe1 b4 30. Bb2 a4 31. bxa4 Bxa4 32. Kb1 bxc3 33. Bxc3 Rb8+ 34. Ka2 Ra8 35. Kb2 Kf8 36. Ra1 Rb8+ 37. Kc1 Bf4+ 38. Bd2 Rc8+ 39. Kb2 Rb8+ 40. Kc1 Rc8+ 41. Kb2 Rb8+ 42. Kc1 Rc8+ 1/2-1/2