[Event "ARG-ch sf-B"]
[Site "Mar del Plata ARG"]
[Date "1968.03.??"]
[EventDate "1968.03.00"]
[Round "4"]
[Result "0-1"]
[White "Raul Ocampo"]
[Black "Juan Carlos Hase"]
[ECO "C91"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "102"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. d4  d6 9. c3 Bg4 10. Be3 exd4 11. cxd4 d5 12. e5 Ne4 13. h3 Bh5 14. a4 Na5 15. Bc2  Nc4 16. Bc1 f5 17. Qd3 c6 18. b3 Nb6 19. axb5 axb5 20. Rxa8 Nxa8 21. Nh2 Bg6  22. f3 Ng5 23. Qc3 Qb6 24. Be3 b4 25. Qd2 Ne6 26. f4 Nac7 27. Rd1 Nb5 28. Kh1  Kh8 29. Qf2 Ra8 30. g4 Ra2 31. Rd2 Nbxd4 32. gxf5 Rxc2 33. fxg6 Rxd2 34. Nxd2  hxg6 35. Nhf3 Bc5 36. Qh4+ Kg8 37. Qg4 Nf8 38. Bxd4 Bxd4 39. e6 Bf6 40. Ne5 Qc5  41. Ndf3 Qd6 42. Kg1 c5 43. Kf2 Qxe6 44. Qxe6+ Nxe6 45. Ke3 Bxe5 46. Nxe5 Nd4  47. Nxg6 Kf7 48. Ne5+ Ke6 49. Nd3 Nxb3 50. h4 Kf5 51. h5 Kg4 0-1