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Subject: Re: Hashkey collisions (typical numbers)

Author: Vincent Diepeveen

Date: 08:19:21 04/07/04

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On April 07, 2004 at 10:48:23, Renze Steenhuisen wrote:

>
>>>>>>I'm sure it was some implementation bug with Renze.
>
>Anyone,
>
>I only store result from the main search, so no NULL-move and no Qsearch
>results.

Of course i store nullmove and qsearch.

Saves me at leat 50% (if % is a good term, because it will have of course an
exponential effect in the long run).

>I get a TT-hit ratio of 11.73%, of which a part will generate cut-offs.

That's very high, i'm around 3-5%.

>    (I call something a tt-hit when an entry is found with the same hashkey,
>     draft does not need to be sufficient)
>
>the tt_retrieve code retrieves a move, which I call the TT_MOVE_SUGGESTION.
>
>could someone provide me with a % of TT_MOVE_SUGGESTIONs in a search?

They work very well.

>Cheers...



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