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Subject: Re: is Chess a Hard NP?

Author: Oreopoulos Kostas

Date: 03:06:51 01/21/05

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Forgive me but i think that its another thing how big the problem space is and
if there is a polynomial solution.
The tree is certainly exponential, but is there a proof that finding a solution
is about equal to visiting all nodes? [ like the traveling salesman problem ]

It is certain that chess evaluation can cut the trees size down BUT that does
not provide any clue on wether the problem is NP compete or not.
If we had a perfect evaluation function that will pick the best move always,
then we have of course an O(1) problem. Anything else keeps the problem in NP
space, (an i wrong) but of course cuts down the time required for solving the
problem.



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