[Event "US Open-73"]
[Site "Atlantic City"]
[Date "1972.??.??"]
[Round "4"]
[White "Larsen, Bent"]
[Black "Piasetski, Leon David"]
[Result "1-0"]

1. f4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 c5 5. O-O O-O 6. d3 d5 7. c3 Nc6 8. Na3 b6 9. Qa4 Bb7 10. e4 Qd7 11. Bd2 Rfd8 12. Rae1 e6 13. Qb5 Ne8 14. e5 Nc7 15. Qb3 b5 16. Qd1 a5 17. Nc2 d4 18. cxd4 Nxd4 19. Ncxd4 cxd4 20. Qe2 h6 21. h4 b4 22. Rc1 Bd5 23. h5 Kh7 24. Nh4 Bxg2 25. Qxg2 Nd5 26. Qe4 Ne7 27. hxg6+ fxg6 28. Rc4 Nf5 29. Nxf5 gxf5 30. Qc6 Qf7 31. Qf3 Rac8 32. Rfc1 Rxc4 33. Rxc4 Bf8 34. Be1 Rd5 35. Bf2 Bc5 36. Qd1 Qe8 37. Kh2 h5 38. Qc1 Qb5 39. a3 b3 40. a4 Qb6 41. Be1 Kg6 42. Bd2 Kf7 43. Kg1 Kg6 44. Kf2 Kf7 45. Qh1 Kg6 46. Qh4 Kf7 47. Qxh5+ 1-0