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Subject: Re: To Ed: Branching factor formula in Rebel 12

Author: Andreas Herrmann

Date: 04:23:04 08/15/03

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On August 15, 2003 at 01:50:53, Ed Schröder wrote:

>On August 15, 2003 at 01:04:21, Federico Corigliano wrote:
>
>>What's the formula for calculating the (effective) branching factor in Rebel 12
>>(DOS)?
>>I'm interesting in add it to my engine.
>>
>>Greetings,
>>Federico
>
>
>Frederico,
>
>The most easiest and fair rule I could think off is to maintain the time of the
>first mainvariation of the current iteration (t1) and the time of the first
>mainvariation of the previous iteration (t2), then the branch factor is:
>
>bf=t1/t2
>
>My best,
>
>Ed

The branching factor descibes the average number of child nodes. So the formula
should be
bf = (t1-t2)/t2
or better
bf = (n1-n2)/n2

where
t1 = the total time for iterartion n
t2 = the total time for iterartion n-1
n1 = the total nodes until iterartion n
n2 = the total nodes until iterartion n-1

Andreas

• Re: To Ed: Branching factor formula in Rebel 12 Uri Blass 04:52:41 08/15/03
  • Re: To Ed: Branching factor formula in Rebel 12 Andreas Herrmann 09:40:37 08/15/03

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