Author: Dieter Buerssner
Date: 08:12:09 01/13/05
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On January 12, 2005 at 20:33:25, Dann Corbit wrote: >If there were 10^120 in the full tree, then about 10^60 would be in the solution >tree. > >It can be less than that. But it cannot be more. 10^120 nodes makes a rather short game of chess. Effort to slove chess depends on many things. Say you have to look at an average game length of 50 moves only, normal perfectly ordered alpha-beta will look at around sqrt(35^100) nodes. This is a very huge number, much huger than the number of different chess positions. Having really huge hash (for all positions) would of course make the effort smaller. I guess, that I won't live anymore, when something like 10^50 bytes of memory is available for computers. One other number. The mass of the earth is 6*10^24 kg. It is mainly made of iron (the core). But say it was out of oxygen (which is lighter, so we overestimate the number of atoms). The atomic mass of oxygen is 16 g/mol. Avogadro's constant is 6.022e23 mol^-1. The number of atoms in the earth is: 6e24 kg / 0.016 kg/mol * 6e23 mol^-1 = 5.76 * 10^46 Regards, Dieter
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