[Event "US Championship"] [Site "Saint Louis USA"] [Date "2009.05.11"] [Round "4"] [White "Varuzhan Akobian"] [Black "Julio Becerra Rivero"] [Result "1-0"] [WhiteElo "2612"] [BlackElo "2609"] [Variant "Standard"] [TimeControl "-"] [ECO "D46"] [Opening "Semi-Slav Defense: Chigorin Defense"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Bd3 { D46 Semi-Slav Defense: Chigorin Defense } dxc4 8. Bxc4 b5 9. Be2 Bb7 10. O-O O-O 11. Rd1 Qc7 12. e4 e5 13. Bg5 exd4 14. Rxd4 b4 15. Rad1 Bc5 16. Rxd7 Nxd7 17. Na4 Bb6 18. Be7 Ne5 19. Bd6 Nxf3+ 20. Bxf3 Qc8 21. Bxf8 Qxf8 22. e5 Rd8 23. Nxb6 axb6 24. g3 Rxd1+ 25. Qxd1 Qe7 26. Qd4 b5 27. Qa7 Qc7 28. Qc5 g6 29. Kg2 Kg7 30. h4 h5 31. b3 Ba8 32. e6 fxe6 33. Qxb4 Qa7 34. Qc3+?! { (2.24 → 1.37) Inaccuracy. Qe4 was best. } (34. Qe4 Qb8 35. Qxe6 c5 36. Qe7+ Kh8 37. Qxc5 Bxf3+ 38. Kxf3 Qa8+ 39. Ke3 Qxa2 40. Qe5+ Kh7 41. Qxb5 Qa7+ 42. Ke2 Qa2+ 43. Kf1 Qb1+) 34... Kh7 35. b4 Qxa2? { (1.37 → 2.75) Mistake. c5 was best. } (35... c5 36. bxc5 Bxf3+ 37. Kxf3 Qxa2 38. Qd4 Qa3+ 39. Kg2 Qa8+ 40. Kg1 Qc8 41. Qd6 Kg7 42. Qb6 Kf6 43. Qxb5 Qc7 44. Qb6) 36. Qf6?! { (2.75 → 1.96) Inaccuracy. Qc5 was best. } (36. Qc5 e5 37. Qe7+ Kg8 38. Be4 Qf7 39. Qd8+ Qf8 40. Qg5 Qg7 41. Kg1 Kf7 42. Qd8 Bb7 43. Bb1) 36... Qa7 37. Be4 Qg7 38. Qxe6 Bb7 39. g4 Kh6? { (2.29 → 3.84) Mistake. hxg4 was best. } (39... hxg4 40. Qxg4 c5 41. bxc5 Bxe4+ 42. Qxe4 Qf7 43. h5 b4 44. Kf1 Kg7 45. Qxb4 gxh5 46. c6 Kg6 47. Qc3 Qe6 48. c7 Qc8 49. Qd3+) 40. gxh5 Kxh5 41. f3 Kh6 42. h5 Qb2+ 43. Kg3 Qg7 44. hxg6?! { (Mate in 14 → 10.38) Lost forced checkmate sequence. Bxg6 was best. } (44. Bxg6 Qc7+ 45. f4 Kg7 46. h6+ Kxh6 47. Qf6 Qd8 48. Qxd8 Kxg6 49. Qf8 Bc8 50. Qxc8 Kf6 51. Qxc6+) 44... Qc7+ 45. f4 Bc8? { (7.74 → Mate in 5) Checkmate is now unavoidable. Kg7 was best. } (45... Kg7 46. Bf5 Bc8 47. Qxc8 Qxc8 48. Bxc8) 46. Qf6 { Black resigns. } 1-0