FIFA is getting ready to apply the offside rule in soccer at the World Cup, and the basic problem has not changed in 163 years: a goal can be wiped out if an attacker is beyond the second-to-last defender when the ball is played. The goalkeeper is counted as the last defender, so the line that matters is the one just in front of him.
That is why fans keep searching for a simple answer to a rule that shapes almost every attacking move. Soccer is built around 11 players on each side trying to put the ball into the opponent’s goal, but the offside rule blocks the easiest shortcut. It is there to stop teams from parking attackers near the goal and waiting for a long pass, the old cherry-picking tactic that would turn the game into a scramble.
The rule is also one of the most controversial in soccer because it sounds simpler than it is. It only applies in the attacking half of the field, and it does not apply on set pieces, corner kicks, or goal kicks. An attacker can stand in an offside position without breaking the rule. What matters is the moment the ball is delivered. If the receiving attacker was onside then, the play can continue even if he drifts beyond the line afterward.
That timing is where confusion usually starts, and it is why no fan truly agrees on how offside works even though it is one of the most important rules to enforce. If a sideline official sees an attacking player score while offside, the flag goes straight up. The on-field referee is supposed to see it and stop the play. In practice, that split-second judgment is what turns a routine attack into an argument.
Cristiano Ronaldo appears in a caption about an offside goal, a reminder that the rule reaches even the biggest names in the game. FIFA has not laid out every detail of how it will administer offside at the World Cup, but the logic of enforcement is already fixed: the attacker must not be past that second-to-last defender when the ball leaves the passer’s foot. That is the line FIFA will have to hold, because once it slips, the game stops looking like soccer.
