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Subject: Re: definition of fh first move

Author: Andrew Williams

Date: 12:12:57 09/19/04

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On September 19, 2004 at 15:09:31, Michael Henderson wrote:

>On September 19, 2004 at 13:54:15, Andrew Williams wrote:
>
>>On September 19, 2004 at 13:23:32, Michael Henderson wrote:
>>
>>>I'm confused about the definition of this stat.  Does one count null moves and
>>>hash hits in this?  My fh numbers vary dramatically based on what is counted.
>>>Thanks.
>>>
>>>Michael
>>
>>It's best thought of as a measure of your move-ordering. So every time the
>>*first* move you *make* at a node gives you a beta cutoff, increment a counter.
>>If you get a beta cutoff at the node and it's NOT the first move, increment a
>>different counter. Then it's (100*firstCounter)/differentCounter, which is the
>>percentage of your beta cutoffs which occurred on the first move you tried.
>>
>>Andrew
>
>Sorry I'm still a little confused :)
>From this I take it null moves not counted in this, since you can't "make" a
>null move?  That means, if you take out null moves, your fh first move stat goes
>up -- because you can make any real move and get a cutoff on the first move.
>
>Michael


Correct. Null moves bear no relationship to your move ordering anyway.

By the way, as Jose pointed out, that should read:

(100*firstCounter)/(differentCounter+firstCounter)

Andrew



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