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Tigran Vartanovich Petrosian vs Viktor Korchnoi
Korchnoi - Petrosian Candidates Quarterfinal (1980), Velden AUT, rd 6, Mar-19
Queen's Indian Defense: Petrosian Variation (E12)  ·  1/2-1/2


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Kibitzer's Corner
Apr-06-15  Howard: British Chess Magazine claims that Petrosian had a significant advantage here.

But where was it ?!

Apr-11-15  Howard: Still wondering....

Korchnoi analyzed this game, by the way, in the Informant, but for rather obvious reasons, his notes were probably biased.

Apr-13-15  Howard: Still beating the drum here...

Just how much better was Petrosian's

Premium Chessgames Member
  offramp: The position after 29...Rc8 looks to me like a total draw:

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Going backwards, the last big decision was after 27...f7-f6,

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I suppose that here, instead of 28.Rd5, Petrosian could have played 28.e5xf6.

click for larger view

That looks slightly better. But there is a reason that Petrosian was world champion, and there must have been a good reason for him NOT to have played 28.exf6. I don't know what that reason was; the difference doesn't look huge anyway.

Prior to that the game looks fairly level throughout, at least to me. Perhaps the BCM was being overenthusiastic.

I wish I could be more help!

Apr-13-15  jvv: Well, white could try 21.Rd1 or 28.exf6, but I don't see anything decisive.
May-03-15  Howard: BCM was apparently "overenthusiastic" then.
Nov-30-16  Howard: No forced win for Petrosian, then. BCM apparently made an error, then.
Dec-01-16  Petrosianic: <BCM apparently made an error, then.>

"Significant advantage" doesn't mean "Won game".

Dec-03-16  Howard: True ! But I'm still wondering where that "significant advantage" took place.

This particular match has always been of interest to me over the years, but then I've always been a Petrosian buff.

Premium Chessgames Member
  Sally Simpson: At what point did BCM say: "Petrosian had a significant advantage here."

After which move?

Premium Chessgames Member
  shalgo: I looked back at Robert Byrne's New York Times columns about this match, but he does not analyze this game in them. (He analyzes only the decisive fifth and ninth games.)
Dec-04-16  Howard: BCM didn't give a specific move as far as when Petrosian had an advantage.
Premium Chessgames Member
  Zenchess: Instead of the drawish 24. Bf1, White can play 24. Bd7, followed by Bb5 at some point. It targets the c-pawn and prevents Black from ever linking up his pawn majority. While I see no clear win, Black has to play a lot of defensive moves and work for equality.
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