Author: Jan K.
Date: 16:43:46 10/08/04
Go up one level in this thread
On October 08, 2004 at 19:24:08, David B Weller wrote: >Hi Stuart, > >Just working this thru 'out loud' ... > >Eg., > >alpha = -30 beta = +50 depth = d > >so -beta, -beta+1 = -50, -49 > >which gives new alpha = -50 and beta = -49 and depth = d-1 > >now if one of the moves leads to a forced mate we fail high and return MATE-n > >which is negated to -MATE+n > >so, no, the 'null-window' search WILL return mate scores just fine. > this will work only if you return values outside (alfa,beta) bounds....as far as I remember he doesn't do that, in case of a fail high he returns beta instead of MATE-n >-David
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