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Yuri Averbakh vs Tigran Petrosian
Moscow Team Championship (1961), Moscow URS
King's Indian Defense: Saemisch Variation. Normal Defense (E81)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Dec-20-20
Premium Chessgames Member
  Honza Cervenka: Very irrational and very entertaining game resulting in rare loss of Petrosian in this variation, who used to play it regularly from both sides.
Dec-20-20  carpovius: <Honza Cervenka> just looks like the score is incorrect
Dec-20-20
Premium Chessgames Member
  Honza Cervenka: Well, I have to say that I see nothing utterly nonsensical, what would have been clearly suggesting an error in the game score. 10...Bxc4 was a mistake but not exactly improbable one even at this level. After 12.h5 black is facing a threat 13.Bxg7 Kxg7 14.hxg6 fxg6 15.Qh6+ Kg8 16.e5 with win, and 12...Nxh5 is no remedy for simple 13.Rxh5 gxh5 14.Qg5. So 12...Bh8 is quite understandable and black has no satisfactory alternative, which would be clearly better. White could have taken the Exchange but 13.hxg6 was objectively sound, and once white have decided not to take on f8, then it is quite understandable that he did not take one move later continuing with his attack. In later course of the game there were some imprecisions from both sides but in very complex and sharp position this is not surprising. 20...Rxb2 was a suboptimal decision, as black could have taken the Pawn e5 without fear 20...dxe5! and white has no time to retake it with 21.dxe5? for 21...Nd5 22.Qc2 Nxe5 covering Pg6 and turning the table. Instead of 21.dxe5 white must play immediately 21.Qc2! with continuation 21...Re7! 22.Qxg6+ Bg7 with complex and unclear position. But again to miss or misevaluate that is nothing strange, and 20...Rxb2 is by far the best alternative in the position. 24...Nb4+ was very tempting though it turned out to be a grave mistake leading to a quick collapse of black. On the other hand, white was already probably winning anyway.

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