ChessBase: The science of chess

According to a recent news article in Nature, what separates grandmasters and other good players from the rest of us is their scientific attitude towards their individual moves. These players try to disprove the accuracy of each move before playing it, rather than the more optimistic attitude of us weaker players. This sounds like Dan Heisman's idea of real chess vs. hope chess. Here's an eprint of the actual paper by Michelle Cowly and Ruth Byrne, "Chess master's hypothesis testing." via ChessBase