Author: Stuart Cracraft
Date: 21:27:32 07/28/04
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On July 28, 2004 at 12:54:25, Tord Romstad wrote: >On July 28, 2004 at 12:36:13, Stuart Cracraft wrote: > >>On July 28, 2004 at 12:25:32, Tord Romstad wrote: >>> >>>It is probably not a good idea to use ETC close to the leaves. I use it >>>only when the remaining depth is at least 4 plies. >>> >>Thanks -- I have heard 2 instead of 4 but will experiment. > >Yes, you obviously have to experiment in order to find out what number >works best for you. The reason that my number is as big as 4 could be >that I prune a lot of moves in the last few plies. > >>My makemove is cheap so no problem there. (I wish it were >>expensive since then my program would be smarter.) >> >>Do you use MTD(f) with ETC? > >Yes. > >>If so, what is your observation? > >In my experience, it reduces the number of nodes searched by something >like 10-15%. As always, YMMV. > >Tord YMMV was true. See my reply to Richard. I saw 25%. No time savings. Not enough time in the individual positions for it to make a difference. Longer searches might. More testing needed.
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