1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. f3

7. Qd2 is the usual move although Tsagaan has played 7.f3 previously, albeit without very good results according to my limited database.

7... Qb6

7... a6 8. Qd2 Be7 9. O-O-O Bd7 10. h4 b5 11. Nxc6 Bxc6 12. Bd3 Qc7 13. Kb1 h6 14. Be3 Nd7 15. Qf2 Rb8 16. g4 g6 17. Bd4 Rg8 18. Qd2 Bf8 19. f4 b4 20. Ne2 Qb7 21. Ng3 a5 22. Rh3 a4 23. g5 hxg5 24. fxg5 d5 25. Qf2 f5 26. exf5 gxf5 27. Nxf5 exf5 28. Qxf5 0-1 Battsetseg,T (2254)-Justice,D/Philadelphia 2006

8. Nb3 a6 9. Qd2 Nd7 10. O-O-O Qc7 11. f4 b5 12. f5 Nde5 13. fxe6 Bxe6

13... fxe6 seems to be a more natural continuation denying the white knight access to the d5 square and not leaving so many open lines.

14. Nd5 Bxd5 15. exd5 Ne7 16. Nd4 Rc8 17. Kb1 h6 18. Bf4 N7g6 19. g3

19. a4!? is interesting but opens up the queenside 19... Be7 20. axb5 O-O 21. bxa6 and the question is does black have compensation for the two pawn deficit?

19... Be7 20. Bh3 Ra8 21. Nc6 Nc4!

21... Bf6 22. Bxe5 Nxe5 23. Rhf1! Nc4 (23... O-O 24. Rxf6! gxf6 25. Qxh6) 24. Rde1+ Kf8 25. Qf2 threatening Re7

22. Qe2 O-O 23. Rde1 Bf6 24. Bc1 Nge5 25. Rhf1 Nxc6 26. Rxf6 Rfe8?

26... N6e5=

26... gxf6? 27. Qg4+ Kh8 28. Bxh6 Rg8 29. Qh4

27. Qxe8+! Rxe8 28. Rxe8+ Kh7 29. Rf1?

29. Bf5+! was a simple win 29... g6 30. Bxg6+ fxg6 31. dxc6

29... Nd4?

29... Nb4 30. c3 Nxd5 and black is still alive.

30. Rc8

30. c3! Na3+ 31. bxa3 Qxc3 32. Rf2

30... Qe7 31. b3 Nb6 32. Rc3 b4 33. Re3 Qc7 34. Bf5+ g6 35. Bb2? Nxd5

The only reason I can think of why Fan doesn't play this simple capture is because she is worried about a mate on h8 but that is easily defended 35... Nxf5 36. Re8 Ng7 37. Rf8 f5 and black would have been winning.

36. Bxd4 Nxe3 37. Bxe3 gxf5 38. Rxf5

Surely it is white that is playing for a draw in this ending.

38... Kg6 39. Rf4 f5 40. Bd2 a5 41. g4 fxg4 42. Rxg4+ Kf5 43. Rh4 d5 44. Rxh6 Qd8 45. Rh3 d4 46. Rd3 Qd5 47. h3 Qg2 48. Kb2 Ke4 49. Be1 Qg7 50. Bf2

Thanks to a couple of inaccuracies, Tsagaan has managed to round up two pawns and now can play for a win without risk.

50... Qf6 51. Bxd4 Qh4 52. a3 Qh6?! 53. axb4 axb4 54. Kb1

54. Bc5 would win the b4 pawn 54... Qf6+ 55. Kb1 Qf1+ 56. Ka2 Qc1 57. Rd4+

54... Qh5 55. Bb2 Qc5 56. Rd4+ Kf5 57. h4 Qb5 58. Bc1 Qb6 59. Rc4 Kg6 60. Bd2

The last black pawn is about to fall and the rest is just technique, ensuring you don't fall into a perpetual check.

60... Kh5 61. Bxb4 Qg1+ 62. Kb2 Qg7+ 63. Bc3 Qe7 64. b4 Qe6 65. Rd4 Qc6 66. Rf4 Qd6 67. Re4 Qc6 68. Re5+ Kxh4 69. b5 Qb6 70. Kb3 Kg4 71. Bb2 Qd6 72. Kc4 Qd1 73. Kb3 Qd6 74. Re4+ Kf3 75. Rd4 Qe6+ 76. c4 Qe3+ 77. Kb4 Qe1+ 78. Bc3 Qb1+ 79. Ka5 Qc2 80. Bb4 Qb2 81. Bc5 Qa2+ 82. Kb6 Qa8 83. Bd6 Qd8+ 84. Kc6 Qc8+ 85. Kb6 Qd8+ 86. Kc5 Qg5+ 87. Rd5 Qe3+ 88. Kc6 Qe8+ 89. Kb7 Qd7+ 90. Bc7 Qe8 91. Rf5+ Kg4 92. Re5 Qd7 93. b6 Qd3 94. c5 Qf3+ 95. c6 Qf8 96. Rd5 Qf3 97. Rd8 Kh5 98. Bd6 Qf7+ 99. c7 Qd5+ 100. Kb8 Qc6 101. b7 1-0 [Bird C.]