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Vladimir Kramnik vs Alexey Shirov
Shanghai Masters (2010), Shanghai CHN, rd 1, Sep-03
Queen's Gambit Declined: Cambridge Springs Variation (D52)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Sep-03-10  Hesam7: Chessbase gives 25. Re1! as winning: 25. ... Nxg3 (25. ... Bxc4 26. Bxc4+) 26. Nd6+ Kf6 27. Nxc8 Rxc8 28. Rxc8 Nxc8 29. hxg3


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And looking at this position I agree.

Sep-03-10  Hesam7: Chessbase also mention 39. Bb4? as a bad move. White could have achieved a superior version of the same endgame that appeared in the game with 39. Bxe4+ Kxe4 40. Rxg5 Rd1+ (40. ... Rd5 41. Rxd5 Kxd5 42. Kf2) 41. Kf2 Bc6 42. h4.


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Compare that with the game position after 44. h4:


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White is much better in the first diagram.

Sep-03-10  AuN1: i'll be interested in hearing what kramnik thought about that continuation. it is difficult to believe he did not see it. if he did, what reason would he have for not playing it?
Sep-03-10  notyetagm: Kramnik vs Shirov, 2010

25 ?


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(VARIATION)
25 ♖d1-e1! (chessbase)


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<Hesam7: Chessbase gives 25. Re1! as winning: 25. ... Nxg3 (25. ... Bxc4 26. Bxc4+) 26. Nd6+ Kf6 27. Nxc8 Rxc8 28. Rxc8 Nxc8 29. hxg3>

http://www.chessbase.com/newsdetail...

<25.Bxe4? 25.Re1! would win the exchange. 25...Nxg3 (25...Bxc4 26.Bxc4+) 26.Nd6+ Kf6 27.Nxc8 Rxc8 28.Rxc8 Nxc8 29.hxg3.>

Kramnik overlooked what NM Heisman would call <THE UNDERRATED REMOVAL OF THE GUARD> (http://www.chesscafe.com/text/heism...), 25 ♖d1-e1!, attacking the Black e4-knight <DEFENDER> of the d6-forking square.

HEISMAN: <The logic “a guarded piece is not really guarded if the guard can be taken or attacked” is not emphasized in most beginner’s books.>

Change "guarded piece" to "theatened square" and you have a perfect description of the mutual oversight of Kramnik and Shirov both missing the <REMOVAL OF THE GUARD> 25 ♖d1-e1!.

Sep-03-10  notyetagm: I should have paraphrased Heisman's quote as follows:

HEISMAN: <The logic “a guarded <<<square>>> is not really guarded if the guard can be taken or attacked” is not emphasized in most beginner’s books.>

Sep-04-10  acirce: Damn. You need to take your chances in such a short tournament.
Sep-04-10  Everyone: <You need to take your chances in such a short tournament.> accepted by Everyone
Sep-04-10  alexrawlings: Why not 12.. Qxa3?
Sep-04-10
Premium Chessgames Member
  tamar: Neither player saw 25 Re1 wins, but described their thoughts in a post game recap http://www.chessvibes.com/reports/a...

Kramnik said after 23...c4 "almost every move is a critical moment" but he kept seeing 'only moves' for Black that held.

Shirov said he agreed, but wouldn't have been surprised if a computer or Kramnik had found a win.

Sep-04-10
Premium Chessgames Member
  tamar: <alexrawlings: Why not 12.. Qxa3?>

Not many games with that move. Black is behind in development, and holes on d6 and c7, as shown in the game P H Nielsen vs M M Mueller, 2008

Sep-04-10  notyetagm: 25 ?


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<tamar: <<<Neither player saw 25 Re1 wins>>>, but described their thoughts in a post game recap http://www.chessvibes.com/reports/a...

Kramnik said after 23...c4 "almost every move is a critical moment" but he kept seeing 'only moves' for Black that held.

Shirov said he agreed, but wouldn't have been surprised if a computer or Kramnik had found a win.>

Yes, chess is a **very** hard game.

Here two of the world's best players, one of them a former world champion, overlooked a rather straight-forward winning move, 25 ♖d1-e1!.

(VARIATION)
25 ♖d1-e1!


click for larger view

Sep-05-10
Premium Chessgames Member
  HeMateMe: <Why not 12.. Qxa3?>

Seems to lose a tempo at GM level. I don't know the exact moves, but white gets good counterplay.

Sep-06-10  notyetagm: Kramnik vs Shirov, 2010

25 ?


click for larger view

(VARIATION)
25 ♖d1-e1!


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Game Collection: THE UNDERRATED REMOVAL OF THE GUARD -- Heisman 25 Rd1-e1! attacks Black e4-knight defender of d6-forking sq

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25 Rd1-e1! attacks Black e4-knight defender of d6-forking sq
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