[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.25"]
[Round "2"]
[White "Bronstein, David Ionovich"]
[Black "Biyiasas, Peter"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. O-O O-O 8. c3 d6 9. Nbd2 Na5 10. Bc2 c5 11. Re1 Nc6 12. Nf1 Re8 13. a4 Rb8 14. axb5 axb5 15. Bb3 Qc7 16. Bg5 Nd7 17. Be3 Nb6 18. Ng3 Nd8 19. Nd2 Be6 20. Bxe6 Nxe6 21. Qb3 Qc6 22. Nf3 Ra8 23. Rad1 Bf8 24. d4 Nc7 25. d5 Qb7 26. Nd2 Nd7 27. Ne2 f5 28. f3 f4 29. Bf2 Ra4 30. Qc2 Rea8 31. Nc1 Be7 32. Nd3 Bd8 33. b3 Ra2 34. Qb1 Ne8 35. Nc1 R2a5 36. Qd3 Bb6 37. Qf1 Nc7 38. g3 fxg3 39. hxg3 Rf8 40. Qh3 Rf7 41. Kg2 Ra8 42. f4 c4 43. Bxb6 1/2-1/2