Author: Jeremiah Penery
Date: 04:21:44 02/28/01
Go up one level in this thread
On February 27, 2001 at 13:35:33, Enrique Irazoqui wrote: >On February 27, 2001 at 10:49:29, Uri Blass wrote: > >>On February 27, 2001 at 10:07:31, Robert Hyatt wrote: >> >>>On February 27, 2001 at 08:24:14, Jorge Pichard wrote: >>> >>>>I believe that the drawish move was Qe3! instead of the Qxc6? Can somebody >>>>post the FEN string that produce the graphical position for me. Plus I wonder >>>>what program save the draw in the shortest time possible? >>> >>> >>>None can see this. It is a 60+ ply repetition. Way beyond anything we can >>>see today. >> >>We need to test all the programs in order to say that none can see it. >> >>Some programs like dark thought are not available so we cannot know that none >>can see it. >> >>The fact that it is 60 ply repetition is not a proof that none can see it >>because programs only to need the right extensions to see the relevant 60 plies >>forward. >> >>If you are wrong then testing only one program is enough to prove it. >> >>Uri > >Deep Fritz doesn't see the draw yet after one hour, but it's getting there. Now >I am trying with Deep Shredder and I might leave one of them computing the >position overnight. > >What has been the evaluation that came closest to 0.00? > >Enrique > >Comp Deep Blue - Kasparov,G >1r6/5kp1/RqQb1p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 b - - 0 1 > >Analysis by DEEP FRITZ : > <SNIP> >45...Qe3 46.Qxd6 Re8 47.h4 h5 48.Bf3 Qc1+ 49.Kf2 Qd2+ 50.Be2 Qf4+ 51.Kg1 > ± (1.00) Depth: 19/50 00:25:38 1907813kN >45...Qe3! > ² (0.69) Depth: 20/52 00:56:36 4195172kN > >(Irazoqui, Cadaqués 27.02.2001) I have let various versions of Crafty search this position for very long periods of time in the past. I've had it return what looks like a draw score at around ply 21 or so, and then at the next ply the score will go back up and the line will change a lot! I never could figure out why this was. BTW, there is a good line posted at the bottom of http://www.rebel.nl/db2.htm for this position. It looks like Fritz is following it fairly well so far, but Crafty also looked to be following it when it found the drawscore, then it changed its mind away from the line, and again the score started to rise. :(
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