Author: Uri Blass
Date: 15:11:16 12/29/03
some questions:
1)Crafty is using fail hard so is there a reason to change alpha and beta in the
following code and not returning UPPER and LOWER without doing it?
case UPPER:
if (val <= *alpha) {
*alpha=val;
return(UPPER);
}
break;
case LOWER:
if (val >= *beta) {
*beta=val;
return LOWER;
}
2)I am not sure if I understand the following part of HashStore
if (type == EXACT) {
if ((int) tree->pv[ply].pathl >= ply)
word1l|=tree->pv[ply].path[ply];
What does pv[ply].path1 means?
I guess length of the pv line but I am not sure.
type=EXACT means exact score so if I understand correctly crafty stores the move
of the pv in the hash tables when the move of the pv is tree->pv[ply].path[ply]
If I understand correctly when type=EXACT
you may have tree->pv[ply].pathl >= ply when you do not probe the egtb when it
is 0 when you probe them.
Am I correct?
Uri
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