[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.09.27"]
[Round "4"]
[White "Smejkal, Jan"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[WhiteElo "2550"]
[BlackElo "2640"]
1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. d4 Nxc3 6. bxc3 g6 7. e4 Bg7 8. Bb5+ Nc6 9. O-O cxd4 10. cxd4 O-O 11. Bxc6 bxc6 12. Ba3 Bg4 13. Bc5 Re8 14. Rb1 Qd7 15. Rb4 a5 16. Ra4 Qb7 17. h3 Bxf3 18. Qxf3 e5 19. Rc4 exd4 20. Bxd4 Bxd4 21. Rxd4 Qb2 22. Ra4 Red8 23. Qb3 1/2-1/2