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Subject: Re: 32bit hashing signature

Author: Alvaro Jose Povoa Cardoso

Date: 14:35:27 04/15/01

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On April 15, 2001 at 14:39:12, Steve Maughan wrote:

>I haven't done any tests but intuatively I'd go for 64 bit.  The number of
>unique positions in checkers is not that much different to chess (maybe 10^80 as
>opposed to 10^120) and the number of positions searched per sec is higher than
>chess.  Remember that a 64 bit signature is 2^32 time safer.
>
>Steve Maughan

That must me the reason why I get 48 hash collisions on a 50 million node
search. (I check the hash move for legality).
I thought that if I have half the squares of chess and 4 different pieces
(instead of 12 for chess) I could get away with 32bit hash signatures.

Alvaro Cardoso

• Re: 32bit hashing signature Tony Werten 00:04:38 04/16/01
  • Re: 32bit hashing signature Steve Maughan 03:45:48 04/16/01
    • Re: 32bit hashing signature Alvaro Jose Povoa Cardoso 10:54:25 04/16/01
      • Re: 32bit hashing signature Steve Maughan 02:33:01 04/17/01
    • Re: 32bit hashing signature Alvaro Jose Povoa Cardoso 10:53:34 04/16/01
    • Re: 32bit hashing signature Alvaro Jose Povoa Cardoso 10:51:38 04/16/01

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