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Subject: Re: Interesting test position

Author: Howard Exner

Date: 18:02:42 01/19/98

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On January 19, 1998 at 00:05:42, Robert Hyatt wrote:

>Here's an interesting test position.  This happened in a game on ICC
>tonite between Crafty and a human player (actually Halcion running
>Crafty if you try to find the game.)
>
>In this position, Bxe7 seems pretty natural, tactically.  See if your
>program can find out in time that it is bad.  This was a blitz game
>and Crafty didn't.  Bxe7 fails to Nc4, although Crafty sees the entire
>line almost instantly, there is a tiny flaw at the end that makes this
>fall apart completely.
>
>here's the fen:
>
>2r3k/ppq1ppbp/3nb1p1/4p1B1/6P1/1NP2P2/PP1Q3P/K2R3R w - -
>
>to avoid losing this game, you'd have to play this in 10 seconds or
>so, as it was a 5 0 game I believe...  I certainly can't do it...

I tested this on Rebel 8 and it sticks with h4 from start to finish.
I'm guessing a knowledge solution is at play here as the opposite
King castling typically calls for pawn storms against the king.
I entered Bxe7 manually to see what Rebel 8 does but the eval is about
0.60 less than h4. after black's Nc4 it replys with Qd8+ with an
eventual
perpetual check line.



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