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Subject: Re: A Question on simple Alpha-Beta versus PVS/Negascout

Author: Tony Werten

Date: 01:02:56 03/22/00

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On March 21, 2000 at 20:06:10, Andrei Fortuna wrote:

>In my chess program Freyr I've used simple alpha beta from the start, each time
>I tried to change it to pvs/negascout it didn't work as expected because it just
>generated too many nodes. Does anyone else experienced this behavior ? Is there
>a logical explanation for this ?
>Here's an approximation of the simplified code I used :
>Search(alpha, beta, depth, ply)

It looks quite normal. ( if I'm not overlooking something )
Maybe the problem is in what you do when you get a fail high/low back to the
root. In normal alpha/beta this happens less, wich could explain the difference.


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