[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.05.26"]
[Round "6"]
[White "Keller, Dieter"]
[Black "Donner, Jan Hein"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+ Nbd7 7. Nf5 d5 8. exd5 a6 9. Ba4 b5 10. Bb3 Nb6 11. Ne3 Bc5 12. Nc3 O-O 13. O-O Bd4 14. Kh1 Bb7 15. Ne4 Nbxd5 16. Nf5 Qb6 17. Qe1 Bc8 18. Nxf6+ Nxf6 19. Ne7+ Kh8 20. Nxc8 Qc7 21. c3 Bc5 22. Bg5 Ng8 23. f4 exf4 24. Bxf4 Qxc8 25. Be5 f6 26. Bf4 Re8 27. Qg3 Ra7 28. Rae1 Rae7 29. Rxe7 Nxe7 30. Bc2 Ng8 31. Qh4 h6 32. Qh5 g5 33. Qg6 Re7 34. Bg3 Qe8 35. Qf5 Ba7 36. Bb3 Bb6 37. Bxg8 Kxg8 38. Qxf6 Re6 39. Qf3 Re2 40. h3 Re6 41. Qd5 Kg7 42. Kh2 Qe7 43. Kh1 Qe8 44. c4 bxc4 45. Qxc4 Bd8 46. Qd4+ Kh7 47. Qd3+ Kg7 48. Bf2 Bf6 49. Bd4 Bxd4 50. Qxd4+ Kg6 51. b4 Qc6 52. Qf2 Qe8 53. a4 Rd6 54. Qf5+ Kg7 55. b5 axb5 56. axb5 Qe7 57. Qf2 Qe6 58. Qb2+ Kh7 59. Ra1 Rd7 60. b6 Qf7 61. Qb5 Rb7 62. Qd3+ Kg7 63. Ra7 Rxa7 64. Qd4+ Kg6 65. bxa7 Qb7 66. Qd6+ Kh5 67. Qb8 1-0