Donner, Jan Hein VS Ciric, Dragoljub M 1968.??.??

[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "5"]
[White "Donner, Jan Hein"]
[Black "Ciric, Dragoljub M"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e6 8. O-O exd5 9. cxd5 Re8 10. Nd2 a6 11. a4 b6 12. f3 Nfd7 13. Nc4 Ne5 14. Na3 f5 15. Be3 Nbd7 16. Qd2 Nf7 17. Bd3 Nde5 18. Be2 Bd7 19. exf5 gxf5 20. Bf2 Bh6 21. f4 Ng4 22. Bg3 Qf6 23. Nc2 Qg6 24. h3 Nf6 25. Bh4 Kh8 26. Kh2 Rg8 27. Rg1 Rae8 28. Raf1 Ne4 29. Nxe4 Rxe4 30. b3 Ne5 31. Bxa6 Rxf4 32. Qe1 Re4 33. Qf2 c4 34. Bxc4 Nxc4 35. bxc4 Bxa4 36. g3 f4 37. Nd4 Rge8 38. Ne6 Rxc4 39. gxf4 Rc2 40. Rxg6 Rxf2+ 41. Bxf2 hxg6 42. Bxb6 1/2-1/2