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Ivan Cheparinov vs Fabiano Caruana
3rd Ruy Lopez International (2009), Zafra ESP, rd 1, Jun-13
Gruenfeld Defense: Russian. Accelerated Variation (D81)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Jun-17-09  Blackmagic: Nice Queen sac by Chepa. I doubt Caruana was expecting 31. Rxa7.
Jun-17-09
Premium Chessgames Member
  Gilmoy: It's not a Q sac -- Cheparinov gets R+N for Q, so he sacked a "pawn" to get doubled Rs on the 7th, which is usually a good idea. He can regain the h7-pawn at will, and his passed d-pawn and h6-pawn will surely cost Black at least another piece.

After <24..Re8> the Grunfeld has evolved into an odd KID variation, but White's K is safe in the center, Black's K-side pawn storm hasn't opened any lines, and White got the <sliver under the fingernail> h4-h5-h6 advance, trapping Black's K. Note how Black managed to dilute his mighty Grun/Dragon/Benko DSB into a KID bad-B. Ouch.

<25.Rh3! 29.Rc3> dogpiles on the canonical c-file weakness against KID. Caruana surely saw the "Q sac" coming -- he just had nothing better by then. Black has lost so many tempi with his Knights that White's R/Q(x)c7 is forking Nd7, e.g. 30..Rxc7 31.Qxc7 Qxc7 32.Rxc7 Nc5 33.f3! and Black's position is just awful, while White has 34.Rc6 etc.

In fact, Caruana must have seen it as of 28, when he knows he's so congested that he can't possibly defend c7 enough. <28..a5!?> is <Caruana's counter-sac>, already anticipating <31..bxc2> and hoping that his Q can find a defense against doubled-Rs. Alas, the rest of Black's pieces still had no good squares for the defense. If Black had either Nf6 or Ng5 defending h7, he might have survived.

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