[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.08.02"]
[Round "16"]
[White "Diaz Diaz, Joaquin Carlos"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[BlackElo "2490"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 Nbd7 6. e3 O-O 7. Rc1 a6 8. cxd5 exd5 9. Bd3 c6 10. O-O Re8 11. Qc2 Nf8 12. Ne5 Ng4 13. Bxe7 Qxe7 14. Nf3 Be6 15. Na4 Rad8 16. Nc5 Bc8 17. h3 Nf6 18. Ne5 Ne4 19. Nxe4 dxe4 20. Bxe4 f6 21. Bxc6 fxe5 22. Bxe8 Rxe8 23. Qb3+ Kh8 24. dxe5 Qxe5 25. Rfd1 Qb8 26. Qb6 Bd7 27. Rd6 Bc6 28. Rcd1 Qc8 29. Rd8 Qe6 30. Rxe8 Qxe8 31. Rd8 Qe7 32. Qc7 Qf6 33. f3 Kg8 34. e4 Qxb2 35. e5 Qb1+ 36. Kh2 Qf5 37. Qd6 Qf4+ 38. Kg1 Qe3+ 39. Kh2 Qf4+ 40. Kg1 h5 41. Qc5 Qf5 42. Qd6 Bd7 43. h4 Qf7 44. a4 Be8 45. Qb8 Bxa4 46. e6 Qe7 47. Rc8 Bd7 48. exd7 Qe1+ 49. Kh2 Qxh4+ 1/2-1/2