[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.17"]
[Round "17"]
[White "Keres, Paul"]
[Black "Tan, Lian Ann"]
[Result "1-0"]

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3 O-O 7. Qc2 Nbd7 8. a3 dxc4 9. Bxc4
Nd5 10. Bxe7 Qxe7 11. Ne4 N7f6 12. Rc1 Nxe4 13. Qxe4 Nf6 14. Qh4 Nd5 15. Qg3 Qc7 16. Ne5
Qa5+ 17. Ke2 f6 18. Nd3 Nb6 19. Ba2 Qh5+ 20. f3 Kh8 21. h4 e5 22. dxe5 fxe5 23. Qg5 Qxg5
24. hxg5 Rf5 25. Rcd1 Rxg5 26. Nxe5 Be6 27. Bxe6 Rxe5 28. Bf7 h6 29. Rh5 Re7 30. Bb3 Rd7
31. Re5 Rxd1 32. Kxd1 Rd8+ 33. Ke2 Nd7 34. Re7 Nc5 35. Bc2 a5 36. b4 axb4 37. axb4 Nd7 38.
Bf5 Nf6 39. Rxb7 Nd5 40. Bg6 1-0