Author: Peter Fendrich
Date: 05:30:19 06/26/03
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On June 26, 2003 at 08:11:23, Albert Bertilsson wrote: >Hi Everybody! > >Previously I've used check-extensions, and now I added single-reply extensions. >This has given me some problems because it seems that the engine tries to extend >to much now! Some positions are just searched to very few plies. I guess it has >to do with one side only having one move to do (single-reply) and the other side >constantly checking, and this makes the search go deep immediatly and not >returning until searching to max depth or getting 3-fold repetition. > >I've solved this temporarily by only allowing to extend at most Depth plies, so >when searching to ply 6 maximum search depth should be 12 plies. Anybody have a >better idea? One way to deal with it is to use "fractions of ply". Let's say you search to depth=6 and calling search(depth-1,....) you would instead search to depth=600 (for instance) and doing search(depth-100,...) Now you can extend for instance 90 and acter a while you can't go deeper. With this method you can also get more reasonable values for less important extensions. /Peter >Forgive me for interrupting the other threads with this computer chess related >question. This is still the computer chess forum? :-) >/Regards Albert
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