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Subject: Re: Hashkey collisions (typical numbers)

Author: Vincent Diepeveen

Date: 08:20:13 04/07/04

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On April 07, 2004 at 10:57:29, Renze Steenhuisen wrote:

>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.
>>I get a TT-hit ratio of 11.73%, of which a part will generate cut-offs.
>>    (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?
>>
>>Cheers...
>
>Hmmm, that's weird... when I disable the IID code, I get an even higher number
>of errors...
>
>How important is it to hash in the castling rights and en-passant fields?

Very important; it will go wrong at a tournament otherwise.

>it can't be THAT important can it? because I am just testing everything with the
>startig position only (yes, I know it isn't wise but I have no choice due to
>time constraints)

>...
>
>BuG BuG BuG



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