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I have to questions about the chess game: please help me to understand it.

1- How can a computer program know if this move or that move is better? It calculates all possbile continuation and examine? But if it does, how did it knows waht is the best continuation?

2- What is the estimate of the possible best continuatuons after every move? Is there a pattern, a sequence for it?

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    Some more research effort would have been nice.2012-12-13
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    The Chess programming wiki may help you. For example the [Alpha-Beta algorithm](http://chessprogramming.wikispaces.com/Alpha-Beta). Some level are examined only. Every position has a value (with ponderations for the different pieces).2012-12-13
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    http://en.wikipedia.org/wiki/Computer_chess has some discussion of your first question.2012-12-13

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