[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "7"]
[White "Johner, Hans"]
[Black "Enevoldsen, Jens"]
[Result "0-1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. O-O Nf6 7. Re1 Be7 8. d4 O-O 9. Nbd2 b5 10. Bc2 exd4 11. cxd4 Nb4 12. Bb1 c5 13. d5 a5 14. Nf1 Re8 15. a3 Na6 16. Ng3 Ng4 17. h3 Ne5 18. Nxe5 dxe5 19. Be3 a4 20. Qh5 g6 21. Qe2 c4 22. Kh2 Qc7 23. Bd2 Nc5 24. Bc2 Bd6 25. Bb4 Rac8 26. Qd2 Qd8 27. Re3 Qh4 28. Kg1 Bf8 29. Rf3 Bh6 30. Qc3 Nb3 31. Bxb3 cxb3 32. Qd3 Rc2 33. Bc3 Bg7 34. Re1 Rc8 35. d6 Qd8 36. Rd1 Qe8 37. Ra1 Rc4 38. Nf1 Rd4 39. Bxd4 exd4 40. Re1 Rxb2 41. e5 Bxe5 42. Nd2 Rc2 43. Ne4 Qd8 44. g4 Bc6 45. g5 Bxd6 46. Rf6 Be7 47. Rxc6 Rxc6 48. Qxb5 Rb6 49. Nf6+ Bxf6 50. Re8+ Kg7 51. gxf6+ Qxf6 52. Qf1 Qg5+ 53. Kh1 b2 54. Re1 Qf5 55. Rb1 Qf3+ 56. Kh2 Qxa3 0-1