Wheelchair curling is governed by the World Curling Federation. Wheelchair curlers play on teams of four people. One person on the team throws a 19.96 kilogram granite stone across an ice track. The track is 45 meter long. At the end of the track is a big circle. It has 4 rings. The diameter is 183 centimeters. There is a dot in the center. A team tries to get their stones the closest to the center. After each team throws ten stones, the team with the most stones closest to the center wins.