Jongsma, Alexander VS Donner, Jan Hein 1968.??.??

[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "13"]
[White "Jongsma, Alexander"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. Nf3 c5 2. b3 Nc6 3. Bb2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. g3 e5 7. Nxc6 bxc6 8. Bg2 Qc7 9. O-O Be7 10. c4 O-O 11. Nc3 Be6 12. Qd2 Nd7 13. Rac1 Rab8 14. Nd5 Bxd5 15. cxd5 c5 16. e4 a5 17. Bc3 Rb5 18. Rfe1 Ra8 19. Bf1 Rb7 20. Qc2 Bg5 21. Rb1 g6 22. a4 Rf8 23. Bd3 Qd8 24. Rf1 Ra7 25. Rbe1 Qe7 26. Kh1 Nf6 27. f4 exf4 28. gxf4 Bh6 29. Qg2 Nh5 30. Qg4 Bg7 31. e5 Qd8 32. Bc4 Re7 33. Rf3 Rfe8 34. Rg1 dxe5 35. fxe5 Rxe5 36. Bxe5 Rxe5 37. Rd1 Nf6 38. Qh4 Qd6 39. Rdf1 Ne4 40. Rxf7 Rh5 41. Qf4 Be5 42. Rf8+ Kg7 1/2-1/2