Author: Henk Bossinade
Date: 05:28:36 08/26/04
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On August 25, 2004 at 17:37:59, Bert van den Bosch wrote: >First of all, I hope the forum will continue in some way! > >Before it is gone, I have a question. > >I wanted to check my null move so I tested if the null move would create a >cutoff, and after that I did the normal stuff. So if you have a cutoff with null >moving you are almost sure you will also get a cutoff with the normal proces, >except for zugzwangs of course. But this wasn't happening all the time when I >tested it, and usually the values involved from what I got back from nullmove >and from the normal process were just a few centipawns in difference. Could this >be because of search instabillity? If it isn't a bug in my program I had the >idea to search nullmove with beta-MARGIN in order for the value returned by null >move to bridge the few centipawns gap. And taking MARGIN the few centipawns. But >I'm not sure if that is correct. Can someone shine a light on this? > >Thanks, greetings Bert I get a discrepancy in fewer than 1% of nodes searched. Often the difference is 1 centipawn, wich has to do with zero window search I guess.
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