Chigaev,M vs Barrientos,S

1. e4 c5 2. b3 d6 3. Bb2 e5 4. Bc4 Be7 5. d3 Nc6 6. Ne2 Be6 7. Nbc3 Nf6 8. O-O O-O 9. a4 a6 10. f4 Bxc4 11. bxc4 Nd4 12. fxe5 dxe5 13. Kh1 Rb8 14. a5 Ne8 15. Nd5 Nc7 16. Nec3 Nc6 17. Nxe7+ Nxe7 18. Ne2 Nc6 19. Ng3 Ne6 20. Nf5 f6 21. Bc3 Qe8 22. Ne3 Qg6 23. Nd5 Rfd8 24. Rb1 Rd7 25. Qf3 h6 26. Qh3 Re8 27. Rf2 Kh7 28. Rbf1 Rf7 29. Qe3 Ncd4 30. Qc1 Ref8 31. Ne3 Nf4 32. Bxd4 cxd4 33. Nf5 Qh5 34. Qd2 Ne6 35. Qb4 Rd7 36. Qb6 Qf7 37. h3 Rfd8 38. Kh2 Rc7 39. Ng3 Rc6 40. Qb4 Rd7 41. Nf5 Qf8 42. Qd2 Qf7 43. Rf3 Nf4 44. g3 Ne6 45. R3f2 Qg6 46. Nh4 Qg5 47. Qb4 Nc5 48. Rf5 Qe3 49. Ng2 Qe2 50. R5f2 Qh5 51. Qd2 Qg5 52. Qe1 Qh5 53. Nh4 Ne6 54. Ng2 Ng5 55. h4 Ne6 56. Rf5 Qg6 57. Kh3 b6 58. g4 b5 59. h5 Qe8 60. cxb5 axb5 61. R5f2 Ng5+ 62. Kh2 Qc8 63. Qb1 Rdc7 64. Rc1 Qxg4 65. Qxb5 Qxh5+ 66. Kg1 Nh3+ 67. Kf1 Nxf2 68. Kxf2 Rxc2+ 69. Rxc2 Rxc2+ 70. Kg1 Qg4