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Subject: Re: Programs to mate problems

Author: Will Singleton

Date: 23:21:58 02/17/99

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On February 18, 1999 at 01:58:01, Richard A. Fowell (fowell@netcom.com) wrote:

>MacChess 5.01 sees Nf3! in less than 1 second on my Mac 7300/180.
>
>Here's the log file:
>
>02/01|00:00:00|        2977|+M3  | dxe4+ Rxe4 Qc5+ Re5 Qxe5+
>03/01|00:00:00|        5113|+M3  | dxe4+ Rxe4 Qc5+ Re5 Qxe5+
>04/01|00:00:00|       13542|+M3  | dxe4+ Rxe4 Qc5+ Re5 Qxe5+
>05/01|00:00:00|       22500|+M3  | dxe4+ Rxe4 Qc5+ Re5 Qxe5+
>05/13|00:00:00|       44896|+M2  | Nf3 Qxf1 Qc5+
>
>MacChess runs at about 150,000 nps on my machine, so this is probably
>about 1/3 second.
>
>Richard A. Fowell

Have you ever asked Wim why his program seems to search more nps than most
others?  I run MacChess 4 on my g3, and see > 400k nps routinely.  Seems too
much, even accounting for a stripped eval.

Will




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