Author: Uri Blass
Date: 20:02:52 10/08/04
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On October 08, 2004 at 22:02:41, Andrew Platt wrote: >On October 08, 2004 at 18:43:04, Stuart Cracraft wrote: > >>Okay so on the one hand I am supposed to do a reduced >>search for null move with bounds -beta,-beta+1, and >>return if the value is >= beta. >> >>The mate threat has to be compared with a mate value >>but the beta's above aren't relevant. Do I need to >>do a second reduced search after the above with bounds >>-MATE,-MATE+1 and see if it is >= MATE and if so set >>the mate threat flag to trigger the extension??? > >When I added it I had to systematically go through my code and find all the >places I returned alpha & beta and change them to return the actual score. This >included the hash table code. > >Andy. I did not need to do it returning mate or -mate when the score is mate in the qsearch was enough for me. The new version is better in the ecm-gcp test suite but I need to test to see if it is better in games. Uri
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