Piatigorsky Cup 1st
 
Los Angeles / 1963
 
Black: Petrosian, Tigran V
 

 
White: Benko, Pal C

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A17: English Opening, Hedgehog Defence
 

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 b6 7. Rc1 Bb7 8. cxd5 exd5 9. Bxf6 Bxf6 10. Be2 Qe7 11. O-O Rd8 12. Qc2 Nd7 13. Rfd1 g6 14. Qb1 c6 15. b4 a5 16. a3 b5 17. Qb3 Nb6 18. Ra1 Ra7 19. Ra2 Rda8 20. Rda1 Bc8 21. Bd3 Bg4 22. Nd2 Bg7 23. h3 Be6 24. Qc2 axb4 25. axb4 Rxa2 26. Nxa2 Nc4 27. Nb3 Qg5 28. Kf1 Bf8 29. Qc1 Bf5 30. Bxf5 Qxf5 31. Qc3 Ra4 32. Kg1 Qc8 33. Nac1 Bxb4 34. Qd3 Bd6 35. Rb1 h5 36. Qe2 Qf5 37. Nd3 Ra3 38. Nbc1 Kg7 39. Nb3 h4 40. Nbc1 Qe4 41. Qc2 Bc7 42. Nb3 Bd6 43. Ra1 Nxe3 44. fxe3 Qxe3+ 45. Kh1 Rxa1+ 46. Nxa1 Qxd4 47. Nb3 Qc4 48. Qb1 Qc3 49. Nbc1 c5 50. Ne2 Qf6 51. Qxb5 c4 52. Ng1 cxd3 53. Qxd3 Qe5 54. g3 Qxg3 55. Qd4+ Qe5 (Black wins)