Author: Steve Maughan
Date: 09:16:33 10/10/00
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Dan, Your hash hit rate is way higher than mine (only 4.4%). I'm using a two hash table system with a depth based store criterial and an always replace criteria. What the general consensus - is this too simplistic? Is a multiple hit attempts algorithm much better? My first move cutoff ratio is also poor at 85%. I assume the two are linked! Many thanks, Steve >Mine (Shrike) is doing this in just under 3s (1.27M nodes) on a P3/600. >It's getting about a 35% hit rate on the hash table, so this may well >be the problem. Those hash table moves are really important in getting >good move ordering (and a low branching factor). > >I also keep stats on the fraction of cutoffs from the first move tried >and the fraction that are from hash table moves. In this case I'm >getting 92% of the cutoffs from the first move and 25% from the hash table.
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