Author: Uri Blass
Date: 23:12:20 11/17/03
Go up one level in this thread
On November 17, 2003 at 23:45:58, Carlos Lantigua wrote: >On November 17, 2003 at 21:17:37, Kevin Heider wrote: > >>After watching Fritz not play either f5 or h5 in game 3, I have to say that >>Deeper Blue (DB2) was the best chess computer EVER. Even with a better >>evaluation algorithm; Fritz at 4m nods/sec can NOT be as strong as DB2 at 200m >>nods/sec. >> >>DB2 simply knew when it had to start mixing it up. >> >>I took the position from Move 37 of Game #2 of Deeper Blue vs Kasparov. This is >>the position where Gary claimed that someone (Karpov?) was feeding DB some of >>it's moves. Gary could not believe it when DB played Be4! blocking the black >>e-pawn from advancing. >> >>I had Rebel XP start an infinite search on my DURON 1100MHZ and it took almost >>20 hours to find 37 Be4! (The move Gary claims a computer would never come up >>with) >> >>Granted different programs do different searches/evaluations, but if Be4 is as >>positionally strong as Gary claims then a lot of programs should like it after a >>very deep search. >> >>If I assume: >> >>1. Rebel / Fritz / Junior / Shredder are of roughly equal strength >> >>2. DB took 10 minutes to find Be4 >> >>then I can conclude that X3D Fritz needs a better function or needs to run >>(20hr*60m/10m) 120x faster to play at DB2 strength. >> >>Since I only own Rebel: Has anyone recently checked this famous position to see >>if Fritz, Junior, or Shredder like the position after a deep think? >> >>Rebel XP's lines: >>01:58:56 19.00 Qb6 Rxa2 Rxa2 >>08:14:57 20.00 Qb6 Rxa2 >>19:26:24 20.05 Be4 Rcb8 >>32:42:43 21.00 Be4 Rcb8 Ra6 Qc8 Qa2 >> >>You will also notice on the right side of my screen grab that Rebel's 4th >>favorite variation shows that if 37. Ra6 e4! Qe3 >> >>You can see a screen grab of the analysis at: >>http://home.comcast.net/~kpheider/DB2BE4.GIF >> >>-- Kevin Heider > >GK-DB 97. That is what i call the last real and serious man vs machine match. Of course Fritz is commercial and it is a significant handicap. I believe that Deeper blue had no chance against kasparov in case that kasparov had a copy of the machine before the match except opening book. Uri
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