Here's an interesting quote: "'What did they think I was taking, smart pills?' asked Eythorsdottir, an native of Iceland who now lives in Huntsville, Alabama. 'The moment I invent smart pills, I won't have to play bridge for a living.'" This is from a recent newspaper story about so-called "mind sports" such as chess and bridge becomming olympic sports. Of course, to compete in the olympics, an athlete has to undergo drug tests to make sure they are not cheating. And what drug, exactly, would make someone perform better at chess or bridge? Even too much coffee would make it more difficult for someone to concentrate deeply.