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Subject: Re: (OT) Open Catalan [E04] Improvement by GM Adams = 9...Nb6 and 10...Na5

Author: John Merlino

Date: 12:26:47 07/02/04

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On July 02, 2004 at 15:01:59, José Antônio Fabiano Mendes wrote:

>http://chessbase.com/newsdetail.asp?newsid=1757
>
>Radjabov vs Adams, FIDE World Championship, Tripoli 2004
>The semifinal game in this championship began as a familiar Catalan, the open
>variation with 5...a6 and 6...Nc6. But then Adams uncorked two moves that have
>never been played in tournaments before: 9...Nb6 and 10...Na5. Radjabov was soon
>in trouble. Adams hung on to his extra pawn and Radjabov could not seem to find
>the compensation that White usually has in the Catalan.
>
>Game score ==> http://www.chessgames.com/perl/chessgame?gid=1292802

Very interesting. Playing through the game with CM_SKR, The King seems to think
that White has some decent amount of compensation for the pawn for quite some
time. However, with 27.Nd4 Radjabov appears to go astray. This allows the Knight
fork at c2 and the forced exchange of minor pieces, putting a Black rook on the
2nd rank. After that, it's all downhill for White.

So, in this position:

[D]1kbrr3/1p4p1/p3pp2/2n1P2p/2p4P/n1P1RNP1/P2B1P2/4RBK1 w - - 0 28

CM_SKR prefers 27.Rd1, with an eval of about -0.5 for Black. After 27.Nd4 Nc2
28.Nxc2 Rxd2 29.Nd4, the eval is almost -1.1....

Not to say that Black didn't have a good advantage before 27.Nd4. But I think
that White lost all of his compensation with that move.

jm



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