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Subject: Re: To: Robert Hyatt

Author: Robert Hyatt

Date: 18:58:33 07/23/00

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On July 23, 2000 at 16:19:55, Larry Griffiths wrote:

>Hi Robert,
>
>Vincent Lejeune posted a message on June 01, 2000 at 5:42:33
>that said to download Crafty and use the 'perft' command to get the
>possible moves at 'n' plies.
>
>The message contained...
>
>White(1): perft 1
>total moves=20
>White(1): perft 2
>total moves=400
>White(1): perft 3
>total moves=8902
>White(1): perft 4
>total moves=197281
>White(1): perft 5
>total moves=4865609
>
>I assumed that this produced all the legal moves at each ply level and was using
>it to validate counts in my program.  I matched the 197281 until I added
>en-passant and now I get 197303 at ply 4.
>
>Does your perft command do enpassant, castleing etc?
>
>Larry.


Supposedly... but make sure you are using the most recent version as there
was a counting bug in older version (say 17.8 or so back)...



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