ABSTRACT
The rapidity with which a Kasparov in chess or a Sijbrands in international draughts evaluates a position and chooses a strong move has done much to attach the label of ‘genius’ to these players. Indeed, de Groot (1946) noted that world champion Max Euwe had as much understanding of a position after five seconds as a strong amateur after 15 minutes. How can we explain this rapid perception and categorization of a position?
