Author: Uri Blass
Date: 15:36:33 12/27/01
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On December 27, 2001 at 16:51:52, Rafael Andrist wrote: >On December 27, 2001 at 15:47:33, Uri Blass wrote: > >>7 plies to stop the qsearch is not a holy number and >>I do not know the correct number but it is clear to me that >>not stopping the qsearch at some point is illogical and there is a position when >>Fritz needed an hour to find mate in 1 because of qsearch >>explosion. > >A possible solution which is theoretically correct but a bit tricky to >implement: stop qsearch after x plys and set an "incomplete" flag. If you >recognize during search that the "incomplete" node can still change the value of >the tree, do the qsearch again. (I don't do it yet.) > >> Limiting qsearch is, in my opinion, same as making >>>it almost useless. >> >> >>In most of the qsearches there are not lines of more >>than 7 plies so I do not see why limiting the qsearch to >>7 plies make it almost useless. > >if limiting the qsearch doesn't change much, why limit it and maybe lose >critical information? If in 100 cases it changes nothing and in 1 case I waste 100 more nodes because of not limiting the qsearch then the 1 case may be important. If the price that you pay to get the information is too high and the information is something that you relatively cannot trust then it may be better not to get the information. If I continue to give ideas for free then I have no chance to have a top program in the future so maybe it is better if I stop it. Uri
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