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Subject: Re: Is this solvable by brute force?

Author: Vincent Diepeveen

Date: 07:30:10 09/18/03

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On September 18, 2003 at 10:21:45, Joel wrote:

I would guess you never need a search depth deeper than 32 ply with a good
evaluation function.

So that's really peanuts with a branching factor of around 10 on average.

>I would hazard a guess and say no (using minimax or simple minimax variants).
>
>If you think your average game could go to say 60 ply, then you are going to
>have to examine a _lot_ of positions using plain ol minimax.
>
>B^60ish where B is your branching factor. Even optimal alpha beta won't do much
>to bring that kind of number down to a practical level either. ie Sqrt(B)^ 60ish
>is still absolutely enormous.
>
>If I were you, I would maybe try to backward compute it, and try and be very
>clever with some symmetry pruning. Even then, I wouldn't expect it to work.
>
>Good luck trying though, personally I reckon it would probably be easier to just
>write a weak chess engine! :)
>
>Joel

Not really, this is a 1 day project.



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