Author: Dann Corbit
Date: 15:47:11 01/30/02
Go up one level in this thread
On January 30, 2002 at 18:11:27, Tony Werten wrote: >On January 30, 2002 at 11:56:39, Thomas Mayer wrote: > >>Hi Peter, >> >>>>4^17= 2*(2^17)= 2^18 >>> >>>ROTFL - this thread is definitely getting entertaining :-) >>> >>>4^17 = (2*2)^17 != 2* (2^17) >> >>seems that some forget here simple mathematical rules... :) Anyway, I wonder >>what this thread is good for... IMHO Deep Blue is something mystical, we can't >>catch it anymore... The efforts of the Deep Blue Team were definitely remarkable >>to whatever depth it has searched. > >Agreed. They were the first to beat the world champion (nobody is going to beat >that). They searched a remarkable depth ( with their approach even for today but >specially for 10 years ago ). But they did _not_ search 18 ply. 4^17 is 17,179,869,184 (17 seconds at peak, and 85 seconds at 200M NPS) 4 times longer would be 340 seconds. About five and a half minutes. Let's see... 40 moves in 2 hours is 40 moves in 120 minutes, which gives 3 minutes per move (on average, and ignoring Fischer increment -- if any). Seems likely that they could have easily finished the pv move at 18 ply, if the branching factor was 4. Don't tell me -- my 8th grade math level is getting in the way again. ;-)
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