[Event "Olympiad-17 Preliminaries A"]
[Site "Havana"]
[Date "1966.10.28"]
[Round "3"]
[White "Sin, Kuen"]
[Black "Stein, Leonid"]
[Result "0-1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Qc2 Qc7 5. d4 cxd4 6. Nxd4 Nc6 7. Nb5 Qd8 8. Be3 Ng4 9.
Bf4 a6 10. Nd4 e5 11. Nxc6 bxc6 12. Bg3 Be7 13. Nd2 O-O 14. h3 Nf6 15. Bd3 Be6 16. Rd1 Nh5
17. Bh2 g6 18. Be2 Ng7 19. Nf3 Qa5 20. b3 f5 21. exf5 gxf5 22. O-O Kh8 23. Kh1 Rad8 24. c4
c5 25. Qd2 Qc7 26. Rg1 Bc8 27. Ne1 Ne6 28. Nc2 f4 29. Bf3 Rf6 30. Qc3 Ng5 31. Bd5 f3 32.
Bxf3 Nxf3 33. gxf3 Bb7 34. Rg3 Rdf8 35. Ne1 Qc8 36. Qe3 Qe6 37. Kg1 Rg6 38. Rxg6 Qxg6+ 39.
Bg3 Qh5 40. Kg2 Rg8 41. Rb1 Bc8 42. Kf1 Bxh3+ 43. Ke2 a5 44. Rd1 Rf8 45. Rd5 Qg6 46. Qc3
Be6 47. Rd1 a4 48. Ng2 axb3 49. axb3 Rxf3 50. Qb2 Rxg3 0-1