Cheep related plug.
My most recent book discusses briefly Deep Blue beating Kasparov, computer versus human, in chess, concerning the theory of how to identify intelligence in computers. There are various theories, methods, tests (the Turing test being the most famous) and games (such as chess) to try to identify intelligence in computers. And some famous philosophers say that, even if it exists, intelligence in a computer cannot be verified.
Philosophy of Artificial Intelligence