in which the players wear a belt with two tags attached by velcro, the removal of either counting as a 'tackle'. Tag Rugby also varies in that kicking the ball is not allowed. Similar to Tag Rugby, American Flag Rugby, (AFR), is a mixed gender, non-contact imitation of rugby union designed for American children entering grades K-9. Both American Flag Rugby and Mini Rugby differ from Tag Rugby in that they introduce more advanced elements of rugby union as the participants age. Ten man rugby is an extreme style of play in rugby union in which the team uses the power of its forwards to dominate possession, scrums and line-outs, and the kicking ability of its fly-half to attain position. The four three-quarter backs and the full back are not usually used in attack; if they are, this is usually restricted to the inside centre on the crash ball, and chasing kicks, especially garryowens. Ten man rugby is a very conservative style of play, and not particularly entertaining for the spectator, but can be effective if a team has a strong pack and a good 10, and perhaps less effective backs. The term "ten man rugby" is somewhat derogatory, though most teams will employ these tactics to a degree, especially in foul weather, but usually not exclusively. Other less formal variants include beach rugby and snow rugby. Influence on other sports Rugby league was formed after the Northern Union broke from the Rugby Football Union in a disagreement over payment to players. It went on to change its laws and became a football code in its own right. The two sports continue to influence each other to this day. American football and Canadian football are derived from early forms of rugby football. Australian rules football was influenced by rugby football and other games originating in English public schools. James Naismith took aspects of many sports including rugby to invent basketball. The most obvious contribution is the jump ball's similarity to the line-out as well as the underhand shooting style that dominated the early years of the sport. Naismith played rugby at McGill University. Swedish football was a code whose rules were a mix of Association and Rugby football rules. Rugby lends its name to wheelchair rugby, a full-contact sport which contains elements of rugby such as crossing a try line with the ball to score. Statistics and records According to