Well, if you think about it, humans designed computers to think in the way humans do- computers didn't invent their own logic system. And in a dynamic situation like a game of chess, the reaction of a computer is often that, in response to the human moves, thus the human is still leading the sequence of action- so as long as the human doesn't mess up. Computers sure are fast and efficient but limited in creative capacity. The human brain is still the most intelligent and versatile machine in the known universe. Speaking of which, how is AI research doing?