Author: Robert Hyatt
Date: 14:15:49 11/21/99
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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? > That isn't the proper definition for 'branching factor'. What you are describing is "effective branching factor". You want to do this the other way also... Divide the number of nodes for the N ply search by the number of nodes for the N-1 ply search. That should give you a number that means something to everyone that sees it. 3.0 is good for the middlegame if you use null-move or some forward-pruning algorithm. 5-6 is normal for regular alpha/beta... > > >BvdA
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