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Subject: Re: Two mates from the 1924 NY tournament

Author: F. Huber

Date: 10:05:28 05/10/05

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On May 10, 2005 at 12:12:51, Ignacio Santos Crespo wrote:

>4 seconds for the mate in 7 and < 1 second for the mate in 8 with Chest 4.1
>
>FEN: 3q3k/pp4p1/2bbN1Pp/5p2/3nr3/5N1Q/PPr4P/R1B2R1K b - - 0 1
>
>ChestUCI Ver.4.1:
>CPU: AMD64 3200+
>FEN: 3q3k/pp4p1/2bbN1Pp/5p2/3nr3/5N1Q/PPr4P/R1B2R1K b - -
>Search for 1. Special-Mate [C0/R-3/K2/P9/X38] in 7 ...  (Hash=512MB)
>   7	00:04	     526.540	387.446	+M7	Dd8h4
>Search completed ...  (Time=4.06s)
>Mate in 7 found !  (1. Solution in 00:04)
>  7/7	00:04	   1.842.384	453.565	+M7	Dd8h4 Cf3xh4 Te4xh4+ Tf1f3 Cd4xf3 Dh3xf3
>Ac6xf3+ Rh1g1 Th4xh2 Ac1d2 Ad6g3 b2b3 Th2h1+
>
>FEN: 1K2k3/8/8/P4pp1/3R1Pp1/8/8/8 w - - 0 1
>
>ChestUCI Ver.4.1:
>CPU: AMD64 3200+
>FEN: 1K2k3/8/8/P4pp1/3R1Pp1/8/8/8 w - -
>Search for 1. Special-Mate [C2/R0/K6/P0/X11] in 8 ...  (Hash=512MB)
>   8	00:00	           0	0	+M8	a5a6
>Search completed ...  (Time=0.33s)
>Mate in 8 found !  (1. Solution in 00:00)
>  8/8	00:00	     160.887	490.509	+M8	a5a6 g4g3 a6a7 Re8f7 Td4d6 g3g2 a7a8D g2g1D
>Da8b7+ Rf7e8 Db7c8+ Re8e7 Dc8c7+ Re7e8 Td6d8+
>
>Ignacio.

Hi Ignacio,

why do you solve the 2nd mate (#8) with special mode, when it needs only about
2.5 sec on your super CPU in brute force??
(also the 1st #7 wouldn´t take much longer than 1 min ...)

I´m just wondering ... ;-)

Regards,
Franz.



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