[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.15"]
[Round "19"]
[White "Stein, Leonid"]
[Black "Ivkov, Borislav"]
[Result "1-0"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. d5 Nd8 14. a4 Rb8 15. c4 Bd7 16. axb5 axb5 17. cxb5 Bxb5 18. Ba4 Ra8 19. Re3 Nb7 20. Rea3 Bxa4 21. Rxa4 Rxa4 22. Qxa4 Rc8 23. b3 Nd8 24. Bb2 h6 25. Bc3 Qb7 26. Ne1 Rb8 27. Nc2 Nd7 28. Ne3 Nb6 29. Qe8+ Bf8 30. Nf5 Qd7 31. Nxd6 Qxe8 32. Nxe8 Rb7 33. Bxe5 f6 34. Bg3 Nf7 35. Nc7 Bd6 36. Bxd6 Nxd6 37. Ne6 c4 38. bxc4 Nbxc4 39. Nxc4 Nxc4 40. f4 Rb2 41. Ra8+ 1-0