Argus and the cyclops in the clinic

摘要

Over a beer Jim celebrates his first draw against an international chess master, the rankjust below the coveted title of grandmaster (GM). I joke that GMs are next on the menu. "No," he says, "these guys see things on the board which us mortals can't see."A magician asks a spectatorto name any playing card. The five of hearts. The magician opens his wallet, then the zipped compartment within, and pulls out the chosen card. Afterthe show three magicians search in vain for a solution. An experienced magician joins the group and immediately suggests an ingenious and plausible method.