[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "4"]
[White "Bernstein, Ossip Samuel"]
[Black "Kuijpers, Frans"]
[Result "0-1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. O-O Bg7 8. Be3 O-O 9. Qd2 Bd7 10. Rad1 a6 11. h3 b5 12. a3 Qc7 13. Kh1 Qb7 14. Nb3 a5 15. Bxb5 Nxe4 16. Nxe4 Qxb5 17. Nc3 Qh5 18. Qd5 Ne5 19. Nd4 Rac8 20. Ne4 Bg4 21. Ng3 Qh4 22. Qe4 d5 23. Qf4 Bf6 24. Nge2 g5 25. Qh2 Bxe2 26. Nxe2 Rxc2 27. Rd4 Qh6 28. Nc3 e6 29. Bxg5 Qxg5 30. f4 Qg7 31. fxe5 Bxe5 32. Rg4 Bxh2 33. Rxg7+ Kxg7 34. Kxh2 Rxb2 35. Rf4 Rb3 36. Rg4+ Kh8 37. Ne2 Rxa3 0-1