[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.10.20"]
[Round "19"]
[White "Shamkovich, Leonid Alexandrovic"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[WhiteElo "2495"]
[BlackElo "2640"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 c5 16. d5 Nb6 1/2-1/2