Sports movies are an enduring genre for disney. Offensive tactics include improving a team's position on the ice by advancing the puck out of one's zone towards the opponent's zone, progressively by gaining lines, first your own blue line, then the red line and finally the opponent's blue line. Nhl rules instated for the 2006 season redefined the offside rule to make the two-line pass legal; a player may pass the puck from behind his own blue line, past both that blue line and the centre red line, to a player on the near side of the opponents' blue line.