Author: scott farrell
Date: 20:41:55 09/14/02
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Does anyone know what implications fail-soft might have on hashing? If you do a search say from 1 to 2, and under fail soft it returns 2.5 (fail-high / beta cutoff). I am currently storing the score as a beta cuttoff of 2.5. If I see this position again, and the depth is good enough, I return the value from the hash table, so this is fail-soft as well. if (mainTable.flag[te] == flagBeta) if (mainTable.value[te] >= beta) return mainTable.value[te]; I was tracking IID failures, and came up with some debugging that shows occaisonally no entry in the hashtable after a score of >= beta. I am still trying to trace it down. It seems lots more of these occured nearer to the terminal nodes (search horizon). I stopped IID recursing nearer the terminal nodes, and many of the failures stopped. I guess I might not be hashing enough details near the terminal nodes. I have tried turning on and off storing values from the qsearch, but it didnt seem to effect things.
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