Searching extensions

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Article #5470

#5470

From: Kong Sian
Date: Wed, 11 Aug 1993 10:11

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In search.c, when calculating search extensions, there is this section
of code where the search is extended if (hung[side]>1 && ply==Sdepth+1).
My question is why is the search extended only at ply==Sdepth+1 instead
of say ply==Sdepth or even ply>=Sdepth.

In the maxii program, I eliminated the ply==Sdepth+1 check and I feel    
that the program is playing better (i.e. hanging less pieces and searching
deeper in unstable positions).

Comments please?


Kong Sian

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From: kongsian@nsrc.nus.sg (Kong Sian)
Newsgroups: gnu.chess
Subject: Searching extensions
Date: 11 Aug 1993 10:11:38 GMT
Organization: National University of Singapore
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