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Viktor Korchnoi vs Borislav Ivkov
YUG-URS (1967), Budva MNE, rd 8, Jun-??
Queen's Gambit Declined: Charousek (Petrosian) Variation (D31)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Mar-22-20
Premium Chessgames Member
  GrahamClayton: Sharp opening play by Korchnoi with 7. g4, exploiting the non-development of Ivkov's knight on g8, which leads to a pawn advantage and game long pressure along the g-file.
Mar-22-20
Premium Chessgames Member
  perfidious: At the time of this game, 7.g4 was already a well-known byway and had been played by Botvinnik late in his match loss to Petrosian in 1963.

It was actually Ivkov who got carried away, with 8....h5, an overly sharp attempt at refutation. A more modern treatment of this for Black may be found in Lenderman vs Caruana, 2016.

Mar-22-20
Premium Chessgames Member
  beatgiant: See Botvinnik vs Alatortsev, 1934 for the great debate over "when was early g4 in Queen's gambit first played."
Sep-08-21  tbontb: The doubled extra h-pawn looks fragile but Korchnoi shows how to snatch the material and maintain a bind on the g-file, eventually implementing a delayed Q-side minority attack and breaking through in the centre. After the desperate 39....Na4 Black is simply lost so the last chance is 39....Nc4 40.Ra1 dxe4 41.Ra8+ Re8 42.Rxe8+ Kxe8 43.fxe4 when White has a clear advantage but still has to prove the win.

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