Author: Daniel Clausen
Date: 00:33:24 11/27/02
Go up one level in this thread
On November 26, 2002 at 20:29:50, Antonio Dieguez wrote: >On November 26, 2002 at 19:27:01, David Rasmussen wrote: > >>On November 26, 2002 at 18:29:35, Antonio Dieguez wrote: >> >>> >>>>I takes 43 seconds to finish ply 1! >>>>As it can be seen from the output, there aren't any extensions going on here. >>>>But the longest q-search line is to ply 17! >>>>There's definitely something wrong here... :) >>> >>>you may have a bug (probably), but anyway, you can cut the qsearch captures at >>>some point, 7-8-10 plies. I cut it at 8 and wonder if there are an example in >>>wich that hurts anything. >>> >>>be fine. >> >>What is the reasoning behind this? If I just stop at some arbitrary place, the >>in the middle of a 10 piece capture sequence, I return a totally wrong score. I >>mean if there is a capture sequence of 9 ply, and you stop at 8, it might be >>when white have just taken blacks queen, and you return +9, when in fact, if the >>position is reached, black will just recapture whites queen. >> >>I don't understand how this can work, unless some extra care is taken. > >well, to have a chance to hurt, not only there must be a capture sequence of 9 >plies, but those captures must be somewhat reasonable. Anyway, if you want, cut >it at 9 then... but definitely 16 is not needed. If your move-ordering is something like SEE, I wouldn't expect this to happen often anyway. (and when it happens rarely, it's not a problem either) I never liked to cut qsearch at some fixed depth and probably never will. Sargon
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