Author: Uri Blass
Date: 12:51:47 07/28/04
Go up one level in this thread
On July 28, 2004 at 14:21:26, Sune Fischer wrote: >On July 28, 2004 at 11:02:36, Robert Hyatt wrote: > >>On July 28, 2004 at 03:18:52, Sune Fischer wrote: >> >>>On July 27, 2004 at 18:26:16, Robert Hyatt wrote: >>> >>>>Aha. And exactly how many times do you do the N+1 iteration and get the _same_ >>>>best move? For crafty that is about 85% of the time. So I should cut the >>>>search off one ply early? Or is that 15% critical? >>> >>>I don't understand the question. >> >>you said I wasted time by starting the next search which won't fail low most of >>the time. I said you waste time by doing iteration N+1 that doesn't change the >>best move most of the time. See the fallacy in the argument? I _know_ going to >>depth N+1 won't change the best move most of the time. But it will likely >>change the best move when it is important to do so... > >No. >It's going to depend on how much time you have left. >If you need 5 seconds to fail-low and you have 4 seconds left, you won't see it. > >>I never said "win-win". I said it works better for me after testing. And I >>have done _lots_ of testing with various approaches. That's how I settled on >>the current approach. I'm not much for tea leaves and Tarot cards. > >That interesting, because I was beginning to wonder how you could have such >strong opinions on something you _haven't_ tested. :) I can add that I am practically sure that there are more ways for improvement in time management. I do not plan to implement them immediatly but I can only tell that they are in higher priority relatively to pondering when the program is in book because pondering when the program is in book is usually not relevant for more than a single move(often the opponent may play the book moves so it even does not save time) when ideas that can be relevant for every move in the game seem to me more important. Crafty use some good ideas that I did not think about them earlier like using time only to complete the root move that is not first move even after it used the target time if it did not use too much time and this idea inspired me to think about more ideas. Uri
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