Studer,N vs Chigaev,M

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 Na6 7. g4 c6 8. Bg2 Nc7 9. Nge2 e5 10. Qd2 b5 11. cxb5 cxb5 12. a3 Bb7 13. O-O a6 14. Rfd1 Ne6 15. dxe5 dxe5 16. Nd5 Rc8 17. Qb4 Nxd5 18. exd5 Nd4 19. Nxd4 exd4 20. Bxd4 Rc4 21. Bxg7 Rxb4 22. Bxf8 Rxb2 23. Bh6 Re2 24. Be3 f5 25. gxf5 gxf5 26. Rac1 Qd6 27. Bf3 Rxe3 28. fxe3 Qg3+ 29. Bg2 Bxd5 30. Rc2 Qxe3+ 31. Kh1 Qxh3+ 32. Kg1 Qe3+ 33. Kh1 Bc4 34. Rcd2 Kg7 35. Rd7+ Kf6 36. R1d6+ Kg5 37. Rg7+ Kf4 38. Rxh7 Qe1+ 39. Kh2 Qe5 40. Rdh6 Kg5+ 41. Kg1 Qe1+ 42. Kh2 Qe5+ 43. Kg1 Qc5+ 44. Kh2 Qxa3 45. Rh5+ Kf6 46. R7h6+ Ke5 47. Rh3 Qc1 48. Rh8 Qf4+ 49. Kg1 Qd4+ 50. Kh2 Qf4+ 51. Kg1 Kd6 52. R3h6+ Kc5 53. Rc6+ Kb4 54. Ra8 a5 55. Rca6 Qd4+ 56. Kh2 Qh4+ 57. Kg1 a4 58. Rg8 Qd4+ 59. Kh2 Qe5+ 60. Kg1 f4 61. Rf8 Qc5+