The competition format has changed several times. From the beginning in 1966, the World Championships consisted of only two competitions: an individual race and a relay. In 1991, a short distance race (roughly 20–25 minutes) was added and a sprint race was added in 2001. The middle distance (roughly 30–35 minutes) replaced the short distance in 2003. On IOF's 23rd congress in Lausanne in 2012, it was decided that a sprint relay event would be added in the 2014 World Championships in Italy. The sprint relay is competed in urban areas and consists of four-orienteer mixed-gender teams with starting order woman-man-man-woman.