[Event "Capablanca Memorial-10"]
[Site "Cienfuegos"]
[Date "1973.03.04"]
[Round "11"]
[White "Diaz Diaz, Joaquin Carlos"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd2 g6 7. b3 Bg7 8. Bb2 Bxb2 9. Qxb2 Nf6 10. h3 O-O 11. Nc3 Bd7 12. Be2 b5 13. cxb5 axb5 14. Bxb5 Qa5 15. O-O Nxe4 16. Nxe4 Qxb5 17. Rfd1 f6 18. Rac1 Qb7 19. Qd2 Be6 20. Re1 Ne5 21. Nxe5 fxe5 22. Qh6 Bd5 23. Ng5 e6 24. Rc2 Ra7 25. Rec1 Qg7 26. Qxg7+ Rxg7 27. Rc8 Ra7 28. R1c7 Rxc7 29. Rxc7 h6 30. Nf3 Ra8 31. Rc2 Kf7 32. Nd2 Ke7 33. f3 Kd7 34. Kf2 Ra6 35. Ke3 Bc6 36. Nc4 Bb5 37. a4 Bxc4 38. Rxc4 Rb6 39. b4 d5 40. Rg4 h5 41. Rxg6 Rxb4 42. Rg5 e4 43. fxe4 Rxe4+ 44. Kf3 Rxa4 45. Rxh5 Kd6 46. Rh6 Ra3+ 47. Kf4 d4 48. Rh8 e5+ 49. Kf5 Re3 50. Rd8+ Kc7 51. Rd5 Kc6 52. Rd8 1/2-1/2