A scrum (short for scrummage) is a method of restarting play in rugby that involves players packing closely together with their heads down and attempting to gain possession of the ball.
A scrum is formed by the players who are designated forwards binding together in three rows. The scrum then ‘engages’ with the opposition team so that the players’ heads are interlocked with those of the other side’s front row. The scrum-half from the team that did not infringe then throws the ball into the tunnel created in the space between the two sets of front rowers’ legs. Both teams may then try to compete for the ball by trying to hook the ball backwards with their feet.
Forwards in rugby league do not usually push in the scrum, scrum-halves often feed the ball directly under the legs of their own front row rather than into the tunnel, and the team with the put-in usually retains possession.