[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.15"]
[Round "16"]
[White "Hort, Vlastimil"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
1. c4 Nf6 2. Nf3 c6 3. Nc3 d5 4. e3 Bg4 5. Qb3 Qb6 6. Ne5 Be6 7. d4 dxc4 8. Bxc4 Bxc4 9. Qxc4 e6 10. e4 Qa6 11. Qe2 Qxe2+ 12. Kxe2 Nbd7 13. Nxd7 Nxd7 14. Be3 Bd6 15. Rhd1 1/2-1/2