[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.13"]
[Round "1"]
[White "Browne, Walter Shawn"]
[Black "Hartoch, Robert G"]
[Result "1-0"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 a6 6. g3 Nge7 7. Nb3 d6 8. Bg2 Bd7 9. O-O Nc8 10. a4 Be7 11. a5 O-O 12. Be3 b5 13. axb6 Nxb6 14. Qe2 Nb4 15. Rfd1 Rc8 16. Na5 Qc7 17. Rd4 d5 18. exd5 N6xd5 19. Nxd5 Nxd5 20. Bxd5 exd5 21. Bf4 Bd6 22. Bxd6 Qxd6 23. c4 Qb4 24. Qd2 Rb8 25. b3 Be6 26. cxd5 Qxd2 27. Rxd2 Bd7 28. Ra3 Rfc8 29. Nc4 Bb5 30. Rd4 Kf8 31. Ra1 Rd8 32. Ne3 Ke7 33. b4 g6 34. Kg2 Kd6 35. g4 Rbc8 36. g5 Re8 37. Rg4 f5 38. gxf6 Ke5 39. Kg3 Rf8 40. Rd1 Rc3 41. Rdd4 Kd6 42. Kg2 1-0