Author: Slater Wold
Date: 23:22:22 04/17/02
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On April 17, 2002 at 22:14:55, Vine Smith wrote: >Good Lord, your machine is fast, fast, fast! What is it -- I think I saw one of >your posts about this but can't quite remember, something like 2x1.7 GHz >Athlon? Dual AMD 1.73Ghz (Athlon XP+2100) - Asus A7M266-D Mobo - 1024MB RAM - 4x36.4GB SCSI - GeForce 4 >It seems roughly 6x as quick as PIII-850 with Junior 7 (assuming Deep Junior 7 >is much the same program), whereas I would have guessed only 4x. Deep Junior 7 is the same program. >The Shredder >analysis was strange -- I guess this is the only program that improves on >slower >hardware! Supporting this, there was a post by Nemeth that Shredder did not play >the awful moves that led to its dismal defeat by Smirin on his slower system. Well, I think there's more to it. If you look at position A with 2 computers, the evals will usually not be a *whole* lot different (granted you're using the SAME exact program). I've actually tested my machine's eval using Deep Fritz vs Deep Fritz on a P200. And the PVs are almost always exactly the same. However there is a LOT of randomness in a SMP search. Branching is almost completly random. >And then there's Crafty; every time I see it fail at a tactical problem, I gain >greater respect for its positional abilities, since this MUST be the way it >stays at the top (versus other non-professional programs, that is). Crafty is a terrific program. And I believe it has just as much positional understanding as any "commercial" program, perhaps even more than some. However, it does sometimes lack in tactics. >Rightly or >wrongly, DB rejected Deep Fritz's eventual choice of 36...b5 after reaching >depth 11(6) -- this had been DB's move at depth 10(6) [whatever that means; 16 >full-width? 10 full, 6 selective? 10 with a selective component plus 6 >full-width?]. Yes, I looked at the log. It looked at Rd7, b5, and eventually went with Kf8 after only looking at it for a short period of time. All of Deep Blue's searchs were full width. What I have come to understand is that 10(6) represents the (6) ply done in software and the 10 shows the ply in HW. The first 6 ply were always done in software, and the remainder was always done in HW. >Regards, >Vine Smith
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