Author: Terry McCracken
Date: 22:08:48 05/27/03
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On May 28, 2003 at 00:10:32, Robert Hyatt wrote: >On May 27, 2003 at 19:11:49, Jorge Pichard wrote: > >>After being completely out-played for the entire game, and with imminent defeat >>on the horizon, Kasparov resigned the 2nd game rather than drag out the >>humiliation. But Deep Blue had made a critical error, allowing Kasparov a >>perpetual check. The analysis is quite deep and extends slightly beyond Deep >>Blue's search horizon. And, apparently, also Kasparov's. Kasparov's team, which >>included Grandmaster Yuri Dokhoian and Frederic Friedel, were faced with the >>delicate task of revealing the news to Kasparov. They waited until lunch the >>next day, after he had had a nice glass of wine to drink. After they revealed >>the hidden drawing resource, Kasparov sunk into deep thought (no pun intended) >>for five minutes before he conceded that he had missed a draw. He later claimed >>that this was the first time he had resigned a drawn position. >> >>Six years later, which program can see the draw in the famous 2nd game of the >>rematch? >> >>Jorge > > >NO program sees this. It is about 60 plies deep. It is unlikely that a >program will see it for quite some time to come, in fact... Bob, is it possible to give a programme just enough knowledge when this kind of position occurs that a type of quiescense search and extensions is employed to seek for perpetuals checks, thus reducing the number of plys substantially, to complete such a task? Or is it too complex and costly to add this type of search? If indeed this type of search would work in the first place? Here is a primitive example is how the Mach III Master found a mate in 11 with only ply search, 4 iterations due to checks and captures, in less than a second! Of course this isn't the same thing but could it be expanded to find such difficult draws quickly or at least in a reasonably short time? [D]1kbr3r/pp6/8/P1n2ppq/2N3n1/R3Q1P1/3B1P2/2R2BK1 w Terry
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