[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.08"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Bronstein, David Ionovich"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 d6 3. Nc3 c6 4. e4 e5 5. Nf3 Nbd7 6. Be2 a6 7. O-O Qc7 8. Re1 Be7 9. a3 O-O 10. Bf1 b5 11. Bg5 Nb6 12. cxb5 axb5 13. Rc1 Qb8 14. h3 Bd7 15. Bh4 Re8 16. Qc2 Be6 17. Bg3 1/2-1/2