[Event "London Invitation"]
[Site "London ENG"]
[Date "1973.09.09"]
[EventDate "1973.09.07"]
[Round "5"]
[Result "1/2-1/2"]
[White "John DM Nunn"]
[Black "David J Strauss"]
[ECO "B33"]
[WhiteElo "2350"]
[BlackElo "2400"]
[Source "John Saunders"]
[PlyCount "136"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8.
Na3 Be6 9. Nc4 Rc8 10. Ne3 Nd4 11. Bd3 Be7 12. O-O O-O 13. Bxf6 Bxf6 14. Ncd5
Bg5 15. c3 Bxe3 16. Nxe3 Nc6 17. Bc4 Ne7 18. Qb3 Bxc4 19. Nxc4 Qc7 20. Nb6 Rcd8
21. Rad1 Qc6 22. Nd5 Nxd5 23. Rxd5 h6 24. Rfd1 Rd7 25. Qb4 Rfd8 26. c4 f6 27.
b3 Kf7 28. Qd2 Ke8 29. Qe2 b6 30. Qh5+ Kf8 31. Qf5 Re7 32. a4 a5 33. R1d3 Ke8
34. Qh3 Rdd7 35. Qe3 Kd8 36. Rb5 Kc7 37. b4 axb4 38. Rb3 Kc8 39. R3xb4 Rb7 40.
f3 Rec7 41. h3 Kd7 42. Kh2 Kc8 43. Qd3 Kd7 44. Qd2 Ke7 45. Qf2 Kd7 46. Qg3 Ke8 47.
Qf2 Kd7 48. Qd2 Kd8 49. Qd5 Rc8 50. Rb2 Qxd5 51. cxd5 Kc7 52. a5 Rcb8 53. Rc2+ Kd7 54. axb6 Rxb6 55. Rxb6
Rxb6 56. Ra2 Rb7 57. h4 Ke7 58. h5 f5 59. Kg3 fxe4 60. fxe4 Rb4 61. Kf3 Kf6 62.
Ra6 Kg5 63. Rxd6 Rb3+ 64. Kf2 Kf4 65. Rg6 Rb2+ 66. Kg1 Rb7 67. d6 Kxe4 68. Re6
Rd7 1/2-1/2