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Subject: Re: Two tactical positions

Author: Jon Dart

Date: 17:02:09 11/23/99

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In position #1, Crafty 16.16 switches from Qxh4 to Qh6 at 4 ply
in under 1 second. So does my program Arasan. The eval is around
-1.8, but Qxh4 is evaluated much worse.

--Jon

On November 23, 1999 at 16:04:49, Dan Andersson wrote:

>These these positions appeared in my two latest 40moves/2hours games at the club
>championship. They are highly tactical in their nature. I have tested them on
>some programs and the evaluations of some of the programs are less than
>accurate. In the first position black felt forced to play Qxh4 is white winning,
>or is it merly a draw? Does your program play Qxh4?
>2br3r/p5k1/3b4/2pPp1pq/Pp2Q1PP/4NP2/1PB5/R2R2K1 b - - 0 1
>In the second position the move is obvious, or not?
>r2q2k1/pp4b1/3np2r/3p1p2/3P1P2/2N1PBK1/PP5Q/2R4R w - - 0 1
>Does your program find Qxh6 and in reasonable time and with a correct
>evaluation, better for white? The really interesting thing about the second
>position is that I spent half an hour four moves earlier and the sac. was made
>instantly. Doing the checking out of the combination in question early, I dont
>think any computers work that way.
>
>Regards Dan Andersson



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