Author: leonid
Date: 16:27:14 11/22/99
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On November 22, 1999 at 15:46:40, Bert van den Akker wrote: >On November 21, 1999 at 17:08:36, leonid wrote: > >>On November 21, 1999 at 14:59:53, Bert van den Akker wrote: >> >>>From the start position I get a branche factor of about 14% >>> >>>This is in a 10 ply search from the start position. >>> >>>The branche factor is defined as: >>> >>>(total_number_of_moves_looked_at_in_a_node_before_cutoff / >>>total_number_of_generates_moves) * 100 >>> >>>Only in the normal search no (quiesence search not counted)) >>> >>>In my case fo a 10 ply search >>>branche factor = 14.2408293344493% (955856/6712081) >>> >>>Is this branch factor good or bad? >>> >>> >>> >>>BvdA >> >> >>Your branching factor (such as you described it) is excellent! Would like to be >>there. >> >>I understood your factor as a number calculated when brute force search is >>executed and no extensions were there. >> >>Your number I consider to be good because of two reasons: >> >>1) If there are no extensions and calculation done by brute force it is beter >>that mine in around 7%. >> >>2) If you logic do the extensions, it is just where it must to be compared with >>few best games that I tryed for this purpose: Genius 4, Rebel 10 and Hiarcs >>7.32. >> >>All the best in your programming! >> >>Leonid. > >I do some extensions. > >1. Check extension >2. forced move extension (only one move) >3. threat extension. > >I also use the nullmove which has a big inpact on >the branch factor I defined. > > >bvdA So, now I see that my response was not conclusive. But your final description is very useful for me. It give the idea what all those extensions are all about. They messed me (before your message)in the most choking way. When I tryed, like you now, to find where my branching factor was, I was mixed-up. By the way, to find the "banching factor" we used the same proportion as the most logical. I tryed my game branching factor against the games that I gave over but then I did not knew all those branching factor existance. Since the moment that somebody explained me this strange phenomenon, I never found my way around the problem. Until now, I don't know how good or bad is my branching factor. I hope you will have more chance. When it will happened, please say your finding here. Thanks, Leonid.
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