Author: Greg Lindahl
Date: 14:02:53 12/21/99
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On December 21, 1999 at 16:18:27, Albert Silver wrote: >That's correct, he says it was done through software: "During the 1997 match, >the software search extended the search to about 40 plies along the forcing >lines, even though the nonextended search reached only about 12 plies." He also >mentions that "The software portion of the search can be arbitrarily selective >without slowing down the system." If you read the beginning of that paragraph, Hsu explicitly says that the 8 plies of software search included forcing. Hsu doesn't say if the final 4 plies of hardware search included forcing by droping back to software or not. Given that the chess chips seem to operate in an embarrassingly parallel fashion, I would suspect that there was no forcing for those plies. Someone could always ask Hsu... How important is forcing in shallow plies verses deeper plies? That's easy to examine using a program. -- greg
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