A dead heat is a tie between two or, rarely, more horses in a race. The terminology originally came from when horses used to race in matches consisting of heats, rather than single races, and the first horse winning two heats was declared the winner of the match. When the judges could not determine the first horse over the finish line, the heat was declared "dead," and did not count. Usually, a photo finish can determine the winner, but at times it is too close to call. If there is a dead heat, wagers are paid on all winning horses, but against half the original stake (or one-third if there were three tied horses, and so on).