Author: Sune Fischer
Date: 01:45:41 05/27/02
Currently I have a search depth limit of 60 plies. However in this very simple (drawn) position my engine has no problem reaching 60 plies in no time. [D]8/8/p1K5/P4k2/8/8/8/8 b - - 0 1 Actually it crashes when it goes beyond 60 plies in a search, has to do with the PV array that has a limited length (and probably other stuff too). The reason it can reach this deep is probably because the position is solved as drawn rather quick (and because of transpositions), but unlike a mate score that I can detect, I can't *detect* a draw score in the same way. Is there a way to now if an exact draw score has been returned? My outer iteration loop stops of course at the 60 plies, but the search is still called and on top of that there is the qsearch. I measured up to 71 plies reached, naturally it crashes. How do I end the search properly when these extreme deeps are reached? Should I just stop iterating at ply 45, that would give the search 15 plies of safety margin? Does other engines too have a maximum depth limit, if so how did you solve this problem? Thanks, -S.
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