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Subject: Re: I think I missed something

Author: Robert Hyatt

Date: 20:56:58 12/08/01

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On December 08, 2001 at 05:21:33, Sune Fischer wrote:

>On December 07, 2001 at 23:52:37, Robert Hyatt wrote:
>
>Bob, I can tell you, that if you do not have more than 77000 pawn positions and
>still get collisions, then you do have a bug.
>
>-S.


For the tests I ran I had a _lot_ more than 77000 pawn positions.  I used a
hash size of 6M, and it was filled quite quickly.  Remember that I didn't
just search a single position.  I annotated a full game.

I don't see any way for a bug to exist here.  The PRN's are known to be
good, hamming-distance-wise, and I always run "validate" tests on everything
for each new version.  That takes that incremental signature and compares it
to a "computed-from-scratch" signature to make sure they match and catch any
errors in the incremental update code (among other things)...




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