[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "4"]
[White "Ciric, Dragoljub M"]
[Black "Shamkovich, Leonid Alexandrovic"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4 11. Qe2+ Be6 12. Ne4 Nxe4 13. Bxe4 O-O 14. O-O Bd5 15. Bd3 Qh4 16. Re1 Rad8 17. Bd2 Rd6 18. f3 Re6 19. Qf2 Qxf2+ 20. Kxf2 Rfe8 21. c4 dxc3 22. Bxc3 Rxe1 23. Rxe1 Rxe1 24. Kxe1 f6 25. Kf2 Kf7 26. Ke3 h6 27. g4 g5 28. f4 Be6 29. f5 Bb3 30. Be4 Ke7 31. Bf3 Kf7 32. Kd2 a6 33. Kd3 Ke7 34. Ke3 Bc2 35. Be4 Bd1 36. h3 Bb3 37. Kd3 Bf7 38. b4 Be8 39. Kc4 b6 40. Bd5 Kd6 1/2-1/2