Ten-pin bowling may be won when one player is ahead by more frames than remain of the possible 12 frames. This variant reduces match length and scoring complexity for two-player matches. The maximum score in a game of ten-pin is 300, scored by making 12 strikes in a row. Before 1908, no one ever received an award for a game greater than 298. ABC used to award medals (gold, silver and bronze) for the three highest individual games rolled in the nation. The number of perfect games bowled during a season first became a problem for American Bowling Congress (ABC) officials in
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: