Author: Robert Hyatt
Date: 20:52:37 12/07/01
Go up one level in this thread
On December 07, 2001 at 18:13:18, William Bryant wrote: > >>I was seeing an error 400K-500K nodes, on my PIII/750 laptop, which is about >>one error every 2 to 4 seconds. On my quad (I didn't run the test there as it >>was playing on ICC) this would turn into an error every second or less, which >>is not acceptable. Some positions produced _many_ errors per second, when there >>were fewer pieces so that more pawn moves were being searched... > >I believe the thread was discussing the frequency of errors using a 32 pawn hash >key which in previous threads you said that, after testing, produced no >significant degree of collisions or errors. This was a mistake on my part. My testing (no errors) was actually done several times, but prior to my conversion to 32 bit signatures for pawn hashing. When I tested this at David's urging, the number of collisions was ridiculous... I am now using 64 bits again. > >If I read the above correctly, this implies that it does produce an unacceptable >level of errors? > >Or is this above error rate discussing the main hash table using a 32 bit key? > pawns only. as explained above. >Would you please clarify. >Thank you. > >William
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