Grip of the Iron Tiger – Petrosian’s Famous King March

#agadmator Max Euwe: Perhaps I can shed a little more light on this. After 12…b4 in reply to 11 a4 played in reply to 11…b5, Petrosian acquires not just one asset on the Queen side, but a number of them, which is to say that Unzicker contracts not just one weakness on the Queen side but a number of them. One consequence of this is that Petrosian acquires an additional asset on the Queen side, control of the c file, which is to say that Unzicker contracts an additional liability on the Queen side. All these make up collectively not a small advantage but a great advantage. In fact we can say that for the remainder of the game, Black’s entire Queen side is crying in wounded agony, impairing thoroughly Black’s ability to contest the duel. Is it then any wonder then, that Petrosian should perform overwhelmingly, as Euwe says? So the explanation is that Petrosian acquires not a small advantage but a great advantage, a great advantage which Petrosian is able to make count, so as to perform overwhelmingly.

Tigran Vartanovich Petrosian vs Wolfgang Unzicker
M:URS-FRG (1960), Hamburg FRG
Queen’s Gambit Declined: Traditional Variation (D30)

1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. c4 c6 5. Qc2 Be7 6. e3 O-O 7. Nc3 h6 8. Bf4 Nbd7 9. cd5 cd5 10. Bd3 a6 11. O-O b5 12. a4 b4 13. Na2 Ne8 14. Nc1 a5 15. Nb3 Ba6 16. Ba6 Ra6 17. Qd3 Ra7 18. Rfc1 Nd6 19. Bd6 Bd6 20. Rc6 Nb8 21. Rc2 Nd7 22. Rac1 Nb6 23. Qb5 Nc4 24. Nfd2 Nd2 25. Rd2 Qa8 26. Rdc2 Rd8 27. Rc6 g6 28. g3 Kg7 29. Kf1 Kf8 30. h4 h5 31. R1c2 Kg7 32. Ke1 Kg8 33. Kd1 Kh7 34. Kc1 Kg8 35. Kb1 Kh7 36. Qe2 Qb7 37. Rc1 Kg7 38. Qb5 Qa8 39. f4 Kh7 40. Qe2 Qb7 41. g4 hg4 42. Qg4 Qe7 43. h5 Qf6 44. Ka2 Kg7 45. hg6 Qg6 46. Qh4 Be7 47. Qf2 Kf8 48. Nd2 Rb7 49. Nb3 Ra7 50. Qh2 Bf6 51. Rc8 Rd7 52. Nc5 b3 53. Kb3 Rd6 54. f5 Rb6 55. Ka2

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