ABSTRACTIn the philosophy of sport, an opinion that chess (and other institutionalized mind games, the so-called mind sports) is in fact not sports because it lacks physical skills is a standard position. I call the argument that leads to this conclusion a mind sport syllogism. Its analysis enables me to explicate four possible positions concerning the sport-status of chess. Apart from the standard position, which excludes chess from the sport family, I also present analysis of other possible positions, which – for various reasons – do not deny that chess is a sport. A position that postulates including chess into the family of sport by broadening the definition of sport turns out to be particularly interesting from the philosophical viewpoint. Having confronted this position with the standard, i.e. ‘conservative’, position, I come to the conclusion that the conceptual revision consisting in the broadening of the concept of sport is a rational option and is a probable direction of the evolution of the concept of sport.