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Subject: Re: Difficult test position

Author: Richard A. Fowell (fowell@netcom.com)

Date: 00:15:27 10/16/99

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On October 14, 1999 at 21:27:35, James Robertson wrote:

>Today in a 5 2 blitz game on FICS, my program reached this position and played
>a5!, which wins. I guess this shows the advantages of a permanent brain, as it
>couldn't find the same move in over one and a half minutes after the game.
>
>3Q4/kp4pp/p3qr2/8/P1N1p3/1P1nP2P/2R3P1/6K1 w - - bm a5;
>
>How long does it take your program to see a5 as substantially better than Qd4?
>If you program gives a5 a score of about 1 to 1.5 pawns for white, it isn't
>seeing everything. :)
>
>CM5500:          6 seconds!
>Crafty 16.18:    55 seconds
>Insomniac 0.54:  1 min, 43 seconds
>Crafty 16.16:    1 min, 59 seconds
<snip>

HIARCS on my 180 MHz Mac sees this in 1-2 seconds.

 1  second  - switches from Qd4 to a5 with score 0f 2.26 pawns
 2  seconds - eval rises to 2.83 pawns
 7  seconds - eval rises to 3.15 pawns
10  seconds - eval rises to 3.86 pawns
21  seconds - eval rises to 4.18 pawns
80  seconds - eval rises to 5.24 pawns

Richard A. Fowell (fowell@netcom.com)
http://dmoz.org/Games/Board_Games/Chess/Software/Macintosh/



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