[Event "Zonal-8 South America (MdP-28)"]
[Site "Mar del Plata"]
[Date "1969.03.25"]
[Round "4"]
[White "Panno, Oscar"]
[Black "Najdorf, Miguel"]
[Result "0-1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Be7 7. cxd5 Nxd5 8. Qc2 Nd7 9. Bd2
N5f6 10. Ng3 c5 11. dxc5 Nxc5 12. Be2 b6 13. O-O Bb7 14. Rfd1 Rc8 15. Rac1 Qc7 16. Qb1 Qb8
17. b4 Ncd7 18. Nb5 a6 19. Nd4 Ne5 20. f3 Bd6 21. Nf1 Rfd8 22. Rxc8 Qxc8 23. Rc1 Qd7 24.
Be1 Nd5 25. Qb2 Be7 26. b5 a5 27. Bf2 Rc8 28. Nd2 Rxc1+ 29. Qxc1 Qd6 30. f4 Nd7 31. Nc4
Qc7 32. Qc2 Bf6 33. g3 Bxd4 34. exd4 N5f6 35. Bd3 g6 36. Ne5 Qd6 37. Nc6 Qxa3 38. d5 Nxd5
39. Nd8 Nb4 40. Qc7 Nxd3 41. Qxb7 Qc1+ 0-1