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Subject: Re: Pawn Hash Collisions in Crafty

Author: Sune Fischer

Date: 01:09:11 12/07/01

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On December 06, 2001 at 21:43:59, David Rasmussen wrote:
>>If you and Bob have 10 times as many pawn positions, then there is nothing
>>strange at all with you having collisions, but since you won't test for that we
>>have no way of knowing.
>>
>
>I will test that for you. I told you that. Do you read my posts?

Hmm, when did you say that?

>>Who is the rest of you?
>
>The others who have posted that they have collisions too.

Well others has also postet collision numbers too,
I believe 77163 was mentioned as a 50% mark.
That would confirm my results as I'm only finding 10000 positions in blitz.

>>The test may show collisions, but then the question is why you get them.
>>I can think of only two reasons:
>>1. You have a bad zobrist table
>>2. You have many more positions than me.
>>
>>I vote for number 2, but obviously I can't prove that since your numbers seem to
>>be a well guarded secret.
>>
>>-S.
>
>At least we agree on that :) I go for number 2 also. But we'll see.

OK, it is probably something trivial like this I'm sure, Crafty is much faster
than mine, so it is probably also searching a lot more positions.

-S.



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