[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.17"]
[Round "17"]
[White "Polugaevsky, Lev"]
[Black "Portisch, Lajos"]
[Result "1-0"]

1. Nf3 d5 2. c4 d4 3. g3 c5 4. e3 Nc6 5. exd4 Nxd4 6. Nxd4 Qxd4 7. d3 Bg4 8. f3 Bf5 9. g4
Bg6 10. Qa4+ Qd7 11. Qxd7+ Kxd7 12. Nc3 e5 13. f4 exf4 14. Bxf4 Bd6 15. Bxd6 Kxd6 16.
O-O-O Nf6 17. h3 Rad8 18. Nb5+ Kd7 19. Nxa7 Ra8 20. Nb5 Rxa2 21. Kc2 Ra4 22. Kc3 Re8 23.
Bg2 Re2 24. Bxb7 Ra2 25. Rb1 Re3 26. Kb3 Ra5 27. Rbd1 h5 28. g5 Nh7 29. h4 Nf8 30. Rhe1
Rh3 31. Re5 Ne6 32. Be4 Bxe4 33. Rxe4 Ra8 34. Rf1 Rf8 35. Kc3 f5 36. Re5 f4 37. Ra1 Re3
38. Ra7+ Kc8 39. Rxe6 1-0