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Svetozar Gligoric vs Lev Polugaevsky
Amsterdam IBM (1970), Amsterdam NED, rd 6, Jul-20
Nimzo-Indian Defense: Normal Variation. Gligoric System Exchange at c4 (E54)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Nov-12-11
Premium Chessgames Member
  GrahamClayton: According to comments by Jan Timman, this endgame was a theoretical draw, but Gligoric allowed Polugaevsky to find the winning plan, which is to capture the f2-pawn, while stopping his own f-pawn from being captured.
Nov-13-11  bronkenstein: Polugaevsky thought that as well (based on Sereshevsky quoting him in `Endgame Strategy`) , and the game should be mathematically equal until only few moves before Gligoric resigned.

BUT ... black can manoeuvre endlessly waiting for the mistake , while white has to play very precisely ,often having to make series of only moves for hours (days?)...

Feb-18-16  Howard: Just found the ending to this game last night in Volume 3 of Kasparov's MGP. Tablebases for six-piece endgames weren't out yet, at the time. Did Polugaevsky miss a quicker win ?

Yes, I could check it myself but I'm too busy right now.

Jun-04-17
Premium Chessgames Member
  Plaskett: Hartston told me that he tried to study this very ending during the adjournment of his game with Sigurjonsson from Hastings 1974-1975. Bill too won this drawn ending by the expedient of tricking Gudmundur into an inaccurate positioning of his bishop and then advancing his pawn to the sixth rank although, as Timman and Polu both assert, that ought not to have been possible against accurate defence. In his introduction to Polu´s Grandmaster Preparation book, Mikhail Tal commented that it is almost impossible here to even see how to set the defender a problem!
Jan-05-20  tinnderbox: For almost 30 moves the ending was a draw. The tournament book mentions that during the adjournment Gligoric was convinced it was a draw. Spassky thought so too - but Polugaevsky kept on trying to win. 102. Ba4 is the losing move. Bh5 would still be a draw for white. But note Polu's accuracy: both 102. ... Rc8 and 103. ... Rc5 are the only moves to force a win.
Sep-06-20  Malfoy: Well, according to the tablebases, Gligoric made another decisive mistake when he played 83.Kg2? (both 83.Be8 and 83.Be2 were correct), but it went unpunished as after 83.. Rg7+ 84.Kf1 instead of 84...Ke4? Polu should have continued with 84...Rg5! followed by 85...Kh4. So Black's play actually was not so immaculate as the legend says, though it must be said that the path to victory in this line is quite computeresque.

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