Attack in the middle
Attack in the Middle (AIM) is one of the game's tactics. It raises the probability that a chance is created in the middle of the field by at least 20%, lowering at the same time the probability that a chance is created on the wing.
It is believed that the usual distribution of chances between left wing, center, right wing and set pieces (including penalties) is 25%-40%-25%-10%. Playing AIM would change it to 21%-48%-21%-10% (if the ability in the tactic is low) or to 17%-56%-17%-10% (if the ability in the tactic is the highest possible). The ability in the tactic is calculated by summing the Passing ability of all your outfield players.
The drawback of the AIM tactic is a weakening of the wing defence.