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Alexander Onischuk vs Eugene Perelshteyn
US Championship (2008), Tulsa USA, rd 3, May-15
Gruenfeld Defense: Russian. Hungarian Variation (D97)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
May-18-08  dabearsrock1010: Im not quite getting whats going on here. black leaves his rook en prise, white doesnt take it and instead moves his knight. then black takes whites rook but i dont see why whats wrong with Qc4.
May-18-08  Gilmoy: 17.Nd5 almost traps Black's Q -- she can escape, but White will get about 5 free tempi kicking her around, e.g. Ra3, b3, Bb2+, Rc1, etc. That looks like White can stroll to a crushing K-side attack, while leaving the Q with no targets.

Compared to that plan, 17.Bxa8 looks blah -- White's N has no more good squares, his Rs are still split, and the cramp that Black's Q exerts on White's Q-side is becoming serious, e.g. Black has counterplay via b4-b3, and a safe square Qc2 to maintain the pressure.

White's first plan looks like it's winning more than 2 pawns, so it's better than a hasty exchange. Black agrees that Q for R+N is the best deal he'll ever get (later on, she won't even get the 2nd piece), so he cashes her in.

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