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Subject: Re: How many Ghz before we can get average 20ply per move?

Author: Robert Hyatt

Date: 19:45:40 06/07/03

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On June 07, 2003 at 11:54:30, emerson tan wrote:

>How many Ghz before we can get average 20ply per move on a tournament time
>control. I always want a computer that can see 10 moves ahead


Lets take Crafty as a case in point, since I know what it can do.  On a
3ghz machine, at 3 minutes a move, it will search 12-14 plies in the
middlegame depending on checks and so forth.  Let's take 13 as an average.

To do 14, requires 3x faster hardware.  you want to go 7 plies deeper, which
means 3^7 times faster = roughly 6.7 terahertz.  or about 2000 times faster
than the fastest machine today.  If you figure on doubling every 18 months,
assuming Moore's law doesn't "run dry" then log2(2187) = roughly 10.  Which
means you need to double the 3.0ghz today about 10 times.  Figure 15 years
with luck.



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