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Subject: Re: safe depth to begin r3 nullmove?

Author: Ernst A. Heinz

Date: 12:09:25 10/10/00

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>Hi Mike,
>
>>Hi pulsar currently uses R2 (depth-3) nullmove untill maxdepth 7 search then it
>>kicks in at R3. I noticed that R3 seems to give more depth.  Pulsar also uses
>>futility pruning in search. if material value plus possible capture plus
>>futility value for that depth <alpha move is not searched.  I'm not sure this
>>futility pruning is so sound so what i was thinking was get rid of pruning in
>>search and be more aggressive with null move.  What are peoples opinions
>>particularly programmers? I'll probably test this somewhat but its hard to get
>>games against high rated opponents for pulsar so i'm hoping for some direction
>>before the testing.
>
>You might consider taking a look at my book "Scalable Search in
>Computer Chess" (http://supertech.lcs.mit.edu~heinz/node1.html).

Sorry for the typo, the correct link to the info page of the book
reads http://supertech.lcs.mit.edu/~heinz/node1.html.

=Ernst=



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