[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.09.27"]
[Round "4"]
[White "Ivkov, Borislav"]
[Black "Velimirovic, Dragoljub"]
[Result "1/2-1/2"]
[WhiteElo "2525"]
[BlackElo "2515"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 e5 10. Bd3 O-O 11. O-O d6 12. Rc1 a6 13. Nd5 Be6 14. Qd2 Bxd5 15. cxd5 1/2-1/2