Also Try:
Theory of football in which any outfield player can take over the role of any other player in a team
Total Football is a tactical system in association football in which any outfield player can take over the role of any other player in a team. A player who moves out of his position is replaced by another from his team, thus retaining the team's intended organisational structure. In this fluid system, no outfield player is fixed in a predetermined role; anyone can successively play as an attacker,... Wikipedia