Mind Sports Olympiad up to International Grandmaster. The Mind Sports Olympiad main event was at large venues for the first four years before being reduced in size due to funding difficulties. It has been held annually since 1997 at the following locations in England: The MSO consists mainly of single event competitions most of which are for the nominal title of Olympiad champion, though some trademarked games are authorised by the game designer and publishers as the official world championships. All games, whether an Olympiad or the official World championship, can count towards the Pentamind. Medals, and more recently trophies, are awarded for
How many angels can dance on the head of a pin? about how many could perch at the same time on the head of a pin"". Dorothy L. Sayers argued that the question was "simply a debating exercise" and that the answer "usually adjudged correct" was stated as, "Angels are pure intelligences, not material, but limited, so that they have location in space, but not extension." Sayers compares the question to that of how many people's thoughts can be concentrated upon a particular pin at the same time. She concludes that infinitely many angels can be located on the head of a pin, since they do not occupy any space there: