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### Subject: Re: Verified Null-Move Pruning, ICGA 25(3)

Author: Omid David Tabibi

Date: 04:14:13 11/22/02

Go up one level in this thread

On November 22, 2002 at 07:13:04, Omid David Tabibi wrote:
>On November 22, 2002 at 07:00:19, Gian-Carlo Pascutto wrote:
>
>>On November 22, 2002 at 06:52:57, Omid David Tabibi wrote:
>>
>>>Many things are not that obvious. Please read the "Conclusions" section for
>>>other algorithms I tried but were inferior to the presented algorithm.
>>>
>>>One interesting point is that at depth 8, the size of the tree constructed by
>>>vrfd R=2 was slightly larger than std R=2; at depth 9, vrfd constructed a
>>>smaller tree, and the gap widens as we search deeper (see Figure 4). So, I
>>>believe than on every program, starting from a certain depth, vrfd R=3 will
>>>construct much smaller trees in comparison to std R=2. And the benefit will
>>>increase as we search deeper.
>>>
>>
>>You didn't expect this?
>
I did expect this :-)
It is quite obvious since the *backbone* is R = 3, so the result of vrfd R = 3
will remain closer to std R = 3 in higher depths.
>
>
>>It's fairly logical. vrfd R=3 is the same as R=3
>>below the first fail high. If you search deeper, you get bigger and bigger
>>parts of the tree that are done with R=3 instead of R=2, so you'll get
>>smaller trees at some point.
>>
>>--
>>GCP

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