First of all

First of all,we need answering the question what is really 'intelligence'?How can we say a system is a 'intelligent'?Because i like chess very much i want to give this example:
Let's think about a chess program which have 3 play modes:human vs human,computer vs human and computer vs computer.If computer play against us or against another computer sensibly can we call it 'intelligent'?Actually not.But if computer 'learns' some new tricks,variations from any source and develop itself on his 'own' then there stands an intelligent system.


For computer chess history look:
http://www.geocities.com/SiliconValley/Lab/7378/comphis.htm
One of computer chess championship:
http://www.cs.unimaas.nl/wccc2006/