[Event "US Open-84"]
[Site "Pasadena"]
[Date "1983.08.16"]
[Round "9"]
[White "Christiansen, Larry Mark"]
[Black "Root, Douglas"]
[Result "1-0"]
[WhiteElo "2520"]
[BlackElo "2395"]

1. d4 e6 2. c4 b6 3. g3 Bb7 4. d5 Bb4+ 5. Bd2 Qe7 6. Bg2 Qc5 7. a3 Bxd2+ 8. Nxd2 exd5 9. Rc1 Ne7 10. cxd5 Qb5 11. Rxc7 Bxd5 12. a4 Qa6 13. Bxd5 Nxd5 14. Rc4 O-O 15. Ngf3 Nc6 16. O-O Nf6 17. Qb1 b5 18. axb5 Qxb5 19. Rfc1 Rfb8 20. b3 a5 21. e3 h6 22. Qa1 Qh5 23. Kg2 Rb5 24. Qa3 Rb4 25. Rc5 Qg6 26. R1c4 Rab8 27. Qc1 Qd3 28. Rxb4 Rxb4 29. Rc4 Rxc4 30. Qxc4 Qxc4 31. Nxc4 Ne4 32. Nd4 d5 33. Nxc6 dxc4 34. bxc4 a4 35. Nb4 Kf8 36. f3 Nd2 37. c5 Ke7 38. Kf2 Nb3 39. Nd5+ Ke6 40. c6 a3 41. Nb6 Kd6 42. Nc4+ Kxc6 43. Nxa3 f5 44. Nc2 Kd5 45. h3 h5 46. h4 Kc4 47. Ne1 Kc3 48. Ng2 Kd2 49. e4 fxe4 50. fxe4 Nc5 51. Kf3 Nd3 52. g4 g6 53. Kg3 hxg4 54. Nf4 Ne5 55. Nxg6 Nxg6 56. h5 Nf8 57. h6 Ke3 58. e5 1-0