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Subject: Re: Counting hashhits

Author: Robert Hyatt

Date: 09:33:09 12/06/00

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On December 06, 2000 at 08:49:06, David Rasmussen wrote:

>To compare hashhit success, we have to agree on some way to count this.
>
>In a one probe scheme it is obvious how this is done. But in multiprobe schemes,
>it isn't. For example, in crafty, hashprobes is incremented once for every call
>to probe, but in every call, the hit counter can potentially be incremented
>twice, because it probes twices. This can result in hashhit percentages like
>167% in the endgame. Which is meaningless.


This should be very uncommon.  Because I take care to not duplicate entries
if possible.  There are a couple of ways around the tests, but it doesn't
happen very often.  I can't recall seeing a 167% unless you only do a 3 ply
search after having done a 20 ply search...



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