Blind Chess Olympiad Blind Chess Olympiad The Blind Chess Olympiad is an international chess competition for the blind in which teams from all over the world compete against each other. The event takes place every four years, and is sponsored by the International Braille Chess Association. The Blind Chess Olympiad is the largest sporting event in the international field of chess for the visually impaired. The forerunner to the Blind Chess Olympiads was a blind chess tournament held in Rheinbreitbach, Germany in 1958. The winner of the event was Reginald Walter Bonham, who would found the International Braille Chess Association. The first official
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: