[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.05"]
[Round "1"]
[White "Hamilton, Douglas Gibson"]
[Black "Kortschnoj, Viktor Lvovich"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 d6 6. Be3 Nf6 7. Be2 Be7 8. O-O O-O 9. f4 Bd7 10. Qe1 Nxd4 11. Bxd4 Bc6 12. Qg3 g6 13. Qd3 b5 14. Bf3 b4 15. Ne2 Qb8 16. c4 bxc3 17. Qxc3 Bxe4 18. Bxf6 Bxf3 19. Rxf3 Rc8 20. Qd4 Bxf6 21. Qxf6 Rc2 22. Ng3 Qb6+ 23. Kh1 Qxb2 24. Qxb2 Rxb2 25. Kg1 a5 26. Rf2 Rab8 27. Raf1 Kf8 28. Rxb2 Rxb2 29. Rf2 Rb1+ 30. Rf1 Rb4 31. Rf3 d5 32. Ra3 a4 33. Ne2 d4 34. Kf2 f6 35. Kf3 Ke7 36. Ke4 Kd6 37. Kd3 Kd5 38. Ng3 e5 39. fxe5 fxe5 40. Ne4 Kc6 41. g4 h6 1/2-1/2