Ivkov, Borislav VS Barendregt, Johan 1969.??.??

[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "6"]
[White "Ivkov, Borislav"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]

1. d4 d6 2. Nf3 Bg4 3. c4 g6 4. Nc3 Bg7 5. e3 e5 6. d5 Nd7 7. e4 Ne7 8. Be2 Bxf3 9. Bxf3 O-O 10. h4 h6 11. h5 g5 12. Be3 f5 13. exf5 Nxf5 14. Be4 Nxe3 15. fxe3 a5 16. Qe2 Nc5 17. O-O-O Qe7 18. Rhf1 Rxf1 19. Rxf1 Rf8 20. Rf3 Rxf3 21. Qxf3 Qf6 22. Qe2 Qf7 23. Kd2 Qd7 24. Qf3 g4 25. Qf5 Qxf5 26. Bxf5 e4 27. Bxg4 Kf7 28. Bf5 Bxc3+ 29. Kxc3 Kf6 30. Bc8 Ke5 31. g4 Na4+ 32. Kb3 Nc5+ 33. Kc2 Kf6 34. Kc3 Na4+ 35. Kd4 Nxb2 36. Bxb7 Nd3 37. Bc8 Nf2 38. Bf5 Kg5 39. c5 Nxg4 40. cxd6 cxd6 41. Bxe4 Kxh5 42. Bf3 Kg5 1/2-1/2