Author: Gian-Carlo Pascutto
Date: 08:00:29 11/14/01
Go up one level in this thread
On November 14, 2001 at 07:10:35, Dan Newman wrote:
>I decided to try an experiment to see if I got different results on a
>test suite using just 32 bits. Part way into the test, Shrike crashed.
>So it looks like I've probably got a bug in my hash table move validity
>checker. Looks like 64 bits spares my program from such failures--so
>it has at least some utility :).
On the contrary, I would say. Thanks to 32 bits hashing you have now
discovered a dangerous bug that was luring around in your programand surely
would have triggered at a critical time in a tournament :)
I did a run of 90 positions, at 1 minute on my Athlon 1000, with
32 and 64 bit hashing:
32 bit 64 bit Ratio
-----------------------------------------------------
Nodes: 574508449 564330729 98.23%
Time: 186910 193491 103.52%
Depth: 10.40 10.36 -0.03
Solved: 58 58
The fluctuations are entirely within the range that I would
expect from just choosing another random seed for the hash
number generator. So, I do not think it makes a difference.
--
GCP
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