[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.28"]
[Round "4"]
[White "Keres, Paul"]
[Black "Bronstein, David Ionovich"]
[Result "1/2-1/2"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4 6. Ne5 Bh5 7. g3 a5 8. Bg2 e6 9. Nxc4 Na6 10. O-O Be7 11. b3 O-O 12. Bb2 Nd5 13. Rc1 Qc7 14. Qd2 Rfd8 15. e4 Nxc3 16. Bxc3 Nb4 17. Bb2 b5 18. Ne3 Qb6 19. axb5 Qxb5 20. Rc4 f6 21. f4 Bf7 22. e5 fxe5 23. fxe5 Bg6 24. Bh3 1/2-1/2