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Viktor Korchnoi vs Anatoly Karpov
Karpov - Korchnoi Candidates Final (1974), Moscow URS, rd 5, Sep-25
Queen's Indian Defense: Anti-Queen's Indian System (E17)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Jul-15-03  actual: <Chessgames.com> This should be classified as a Queen's Indian. E17
Jul-15-03
Premium Chessgames Member
  chessgames.com: I'll buy that.
May-13-07  Ulhumbrus: One justification for 15...Re8 instead of 15..b5 is that 16 Bf4 can be answered then by 16...Ne5
May-13-07  Ulhumbrus: Instead of 23...bxa3, 23...Nb5 takes a step towards the move ...Nd4, improving the position of Black's worst placed piece, the N on c7.
Jun-29-14  dernier thylacine: When you watch this one, you are no more surprised that Karpov was already before becoming worldchampion famous for losing very few games!

The art of defence he displays here is unbelievable!!

Sep-08-14  Howard: According to the Volume 18 of the Informant, Korchnoi missed a win somewhere around the 30th move---but I don't recall the details.

Can anyone shed some light here ?

Sep-09-14
Premium Chessgames Member
  Retireborn: <Howard> Informator (notes by Botvinnik) give the missed win as 39.Bxe6! a2 40.Ra1 fxe6 41.Ne5.

More interesting seems 39.Bxe6! fxe6 40.Nxa3 ( Botvinnik) Kf7 41.d7 Ke7 42.Nc4 Nxc4 43.Rxb8 Kxd7 44.Rb7+ Kd6 45.Rxh7, which I imagine is a technical win for White, although Black's c-pawn may still cause trouble.

Nov-24-15
Premium Chessgames Member
  offramp: Game 5, Wednesday 25 September 1974.

23.Kh2


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A very hard position to assess. Computers like 23...f5! Not very Karpovian, though.

An interesting try might have been 26.Qc1


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Karpov plays 28...Rb8:


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29.Nd2! giving up the exchange.

After 31.Rxd1 the position is very intense. It is Total War!


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Every piece is crucial.
The bishop on d6 is attacked but it cannot move, as the ♙d5 would march straight down the board. So Karpov protects the bishop with 31...Re8-d8:


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Kortschnoi was now in time-trouble and he took the bishop, 32.Nxd6. There followed 32...Rxd6 33.Nc4 Rf6:


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But what if Kortschnoi had played 32.Bg5 ?


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Now if 32...Rd7 then 33.Nxd6 Rxd6 34.Nc4


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...and the rook can't go to f6! But Black could play 34...Nxb2!=


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...with a similar ending to the game.

In any case, after 32.Bg5 Black <could> have played the very surprising 32...f6!! .

Later, Karpov played 38...a4-a3:


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Kortschnoi could have now played 39.Bxe6! Then 39...fxe6 40.Na3 Kf7 41.d7 Ke7 42.Nc4 leads to this position:


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Is that won for white? Naah.

Nov-24-15  Howard: Mednis analyzed the last twenty moves or so back in 1975, as I recall.

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