Author: Albert Bertilsson
Date: 05:50:56 06/26/03
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On June 26, 2003 at 08:46:13, Martin Bauer wrote: >On June 26, 2003 at 08:11:23, Albert Bertilsson wrote: > >>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? > >I think the maximum number of extensions should be limited. I limit to an fix >number (7) independent of the depth, but your idea sound logical, too. > >If your King is in check and has only one possible move, how many plies do you >extend? Two (One for the check and one for the single response)? Or only one? >Most time, when I extend by two, I got the same problems. May be two plies is >too much. I only extended one ply, but I'm about to try fractional extensions and then I'll test extending with a bit more than one ply. > >>Forgive me for interrupting the other threads with this computer chess related >>question. This is still the computer chess forum? > >It's like talkshows in TV: The lower the level, the more spectators. > >Bye > >Martin
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