1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 O-O 6. Ng3 c5 7. d5 e6

Zenyuk herself has been on the black side of this opening and played 7... Nbd7 8. Be2 h5 9. h3 b5 10. cxb5 h4 11. Nf1 a6 12. Nd2 axb5 13. Bxb5 Ne5 14. f4 Ned7 15. O-O Nh5 16. Nf3 Qa5 17. Qd3 Nb6 18. a4 Bf6 19. e5 Bf5 20. Qe3 Bg7 21. Nxh4 Bd7 22. Be2 Qb4 23. g4 dxe5 24. gxh5 exf4 25. Qxf4 Bxh3 26. Rf3 Bg4 27. Rf2 Bxe2 28. Qxb4 cxb4 29. Nxe2 gxh5 30. Nf5 Bf6 31. Nf4 Kh7 32. Nxh5 Nxd5 33. Nxf6+ Nxf6 34. Nxe7 Ng4 35. Rf4 Rae8 36. Rxg4 Rxe7 37. Kf2 Rb8 38. Bf4 1-0 Formanek, E (2284)-Zenyuk,I (2188)/Philadelphia 2005

8. Be2 a6 9. O-O exd5 10. exd5 Ne8

Both 10... Re8

and 10... Nbd7 are more popular continuations here.

11. Bf4 f5

As Ben Finegold noted in his commentary, Tsagaan plays the most aggressive continuation.

12. Qd2 Nd7 13. Bg5 Bf6 14. Bxf6 Qxf6 15. f4 Nc7 16. Kh1 Rb8 17. a4 Re8 18. Rfe1 Qd4 19. Bd3

Not 19. Qxd4?! cxd4 20. Na2 (20. Nd1? d3) 20... Nc5 with advantage to black.

19... Nf8 20. Rxe8 Nxe8 21. Nge2 Qf2 22. Nd1 Qh4 23. Ng1 Bd7 24. Nf3 Qf6 25. Nc3 Nc7 26. h3 h6 27. Bf1 Re8 28. Rb1 a5 29. Bd3 Na6 30. Rg1 Nb4 31. Bb1 Qe7 32. Re1 Qf6 33. Rg1 Qe7 34. Qf2

Zenyuk declines the invitation to repeat as Tsagaan was in her usual time pressure.

34... Qf6 35. Nb5 Re7 36. Qd2 Rf7 37. Qc3 Nh7 38. Re1 Bxb5 39. axb5

Black can no longer trade queens on the diagonal as the knight will have no safe squares to move to.

39... Re7 40. Rf1 b6 41. Qd2 Qf7 42. g4 fxg4 43. hxg4 Nf6 44. Nh4 Ne4 45. Qh2 Qf6 46. Nf3

Tsagaan was surprised that Zenyuk offered a draw after 46. Nf3 and proceeded to show Zenyuk that she probably had a good advantage after 46... Qg7 47. Re1! Nf6 48. Rxe7 Qxe7 49. Qxh6 Qh7 (Tsagaan actually thought she would have to play 49... Nxg4? but it loses to 50. Qxg6+ Qg7 51. Qe6+ Kh8 (51... Kf8 52. Qc8+ Ke7 53. Qc7+ Kf8 54. Qd8+ Kf7 55. Ng5+) 52. Qe8+ Qg8 53. Qh5+) 50. Qxh7+ Kxh7 51. Nd2 and white is indeed probably winning although she definitely should be able to play on without any chance of losing.

1/2-1/2 [Bird C.]