Author: Vincent Diepeveen
Date: 07:19:38 08/29/00
Go up one level in this thread
On August 28, 2000 at 22:21:40, Robert Hyatt wrote: >On August 28, 2000 at 19:32:05, Larry Griffiths wrote: > >>I have been reading about the History Heuristic and have seen pro's and con's >>about it. >> >>I plan on implementing it to see what happens. This heuristic is related to >>killer moves and uses the from and to squares in a 64 x 64 array to maintain >>history information when moves are bestmoves or cutoffs. Each entry has 2 to >>the depth power added to it when a bestmove or cutoff is found. >> >>Would you recommend the History Heuristic, and has anything changed for the >>better with the method described above? >> >>Thanks in advance. >> >>Larry. > > >Works fine, but don't use 2^depth... for reasonable search depths, that will >overflow 32 bit counters almost immediately. I use depth^2 which is much >safer... > >Other than that it works fine. If you don't get a cutoff by the time you have >tried a few history-ordered moves, you probably should give up and just search >the rest of the moves in random order. Oh well is this bob speaking? searching things in random order is never a good idea actually.
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