Author: Martin Bauer
Date: 05:46:13 06/26/03
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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. >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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