[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "4"]
[White "Stein, Leonid"]
[Black "Langeweg, Kick"]
[Result "1-0"]
1. Nf3 Nf6 2. c4 e6 3. d4 b6 4. Bg5 Bb7 5. e3 Bb4+ 6. Nc3 h6 7. Bh4 g5 8. Bg3 Ne4 9. Nd2
Nxc3 10. bxc3 Bxc3 11. Rc1 Bb4 12. h4 gxh4 13. Bxh4 Be7 14. Bg3 d6 15. Be2 Bxg2 16. Rh2
Bb7 17. Bf3 Bxf3 18. Qxf3 Nd7 19. Ke2 Rb8 20. Rch1 Bf8 21. Qc6 Qc8 22. Ne4 Bg7 23. Bxd6
Qb7 24. Qxb7 Rxb7 25. Bf4 Ke7 26. Rg2 Bf8 27. Rgh2 Rg8 28. Bxh6 Bxh6 29. Rxh6 c6 30. Kd3
Rbb8 31. a4 Rg2 32. Ke2 Rbg8 33. R1h3 Rg1 34. Rf3 Ra1 35. Rh7 Rf8 36. Nc3 Nf6 37. Rh6 Ne8
38. d5 Ra3 39. e4 Rb3 40. dxe6 Rb2+ 41. Kf1 f6 42. e5 Rc2 1-0