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Ivan Cheparinov vs Vassily Ivanchuk
FIDE Jermuk Grand Prix (2009), Jermuk ARM, rd 5, Aug-13
Nimzo-Indian Defense: Three Knights Variation (E21)  ·  0-1

ANALYSIS [x]

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sac: 40...Qxe1+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Aug-14-09  Troller: In Denmark we have a saying "the smart one fools the less smart one". In this game Black cannot possibly have any sort of advantage after his 19th move, but White then makes an unsound pawn advance with the intention of exploiting his spatial advantage. Probably he overestimated his position; Ivanchuk quickly and confidently activates his pieces and picks up the hapless pawn on move 30.

This is the kind of game Korchnoi could have played as well, and the aggressive Chepa is the perfect victim of the porcupine strategy.

Aug-14-09  Knight13: <Troller> You mean 21. c5 ? How is that unsound if you're talking about preventing black from activating pieces? It locks in the bishop on e7 and threatens Nd6. But if you're talking about 22. c6 then MAYBE, because after 22. b4 a5 black threatens ...Ba6, so b4 is not possible.

Which means 21. c5 might be the problem, but if White doesn't play ...c5 Black just plays ...d5 and he gets his "development" back.

22. Re1, clearing the rook from a6-f1 diagonal in order to play b4, loses a pawn to ...bxc5.

So, in short, I do not agree with you.

Aug-14-09  returnoftheking: I'm not as strong as Chepa :p but the entire Ne4, (Rd1) c5 thing looks kind of silly. Nc3-e4 weakens b5, d5, blocks his own bishop and centre pawn and for what? Probably the idea is to play c5 and crush black in the centre but it only gives black activity and is not logical with the white king's pawns so far advanced. Like troller said, game could have been played by Korchnoi, or Andersson. Not typical Ivanchuk though..he is able to play anything and is equally strong in all sorts of positions. I think he adjusted his style in this game on that of his opponent.
Aug-14-09
Premium Chessgames Member
  HeMateMe: After advancing the kingside pawns, it seems that white should continue the attack on the wing, instead of advancing pawns in the center too. The resulting opening up of the position kills white's kingside attacking chances.
Aug-14-09  notyetagm: 40 ... ?


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http://jermuk2009.fide.com/:

<Ivanchuk is on a roll. After some fortunate escapes in the first few rounds, he has demonstrated strong chess. Today he defeated Cheparinov on the black side of a Nimzovich opening. With an active queen and bishops eyeing many key squares, black infiltrated white’s position, winning the c pawn on move 30. White rallied his remaining forces to attempt a direct onslaught against the black king,<<< but Ivanchuk, in firm control of the only open file, coolly played 40 Qxe1+, forcing trades on white’s back rank and forced resignation on move 41.>>> White’s pawns continue to fall in the final position. A nice game by the Ukrainian.>

40 ... ♕b4x♖e1+! <decoy: e1>


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41 ♕g3x♕e1 ♖c2-c1 <pin>


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Aug-16-09  Ulhumbrus: An alternative to 21 c5 is 21 Qe2, so that on 21...b6 White has 22 Nc6.

Instead of 22 c6, 22 Rc1 prepares to occupy the c file.

Aug-17-09  tibone: <HeMateMe: After advancing the kingside pawns, it seems that white should continue the attack on the wing, instead of advancing pawns in the center too.> That´s why in the press conference cheparinov suggested 21. h4 (followed by moves like Bh3 or f5 maybe) as an improvement.

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