Offside position is not always an offence
Understand the timing of offside, active involvement and direct-restart exceptions.
Position is only the starting point
Under IFAB Law11, the relevant parts of the head, body or feet must be in the opponents' half and nearer the goal line than both the ball and the second-last opponent for an offside position. Hands and arms do not determine that position. Being level with the second-last opponent is not offside.
Use the second-last opponent as the reference, not automatically the last outfield defender. The goalkeeper does not have to be the opponent closest to the goal line.
The timing of the pass matters
Position is judged at the relevant play or touch by a team-mate, not simply when the receiver reaches the ball. The first point of contact is used for that assessment under the Law. A later screenshot can therefore tell a different story from the moment of the pass.
A player can run beyond defenders after an onside starting position. Receiving nearer the goal does not by itself make that run offside. Conversely, someone may look clear when receiving but have been beyond the line at the earlier touch.
Involvement and exceptions
The Law describes interfering with play, interfering with an opponent and gaining an advantage in specified situations. Touching the ball is not the only possible involvement: obstructing an opponent's line of vision or challenging them can matter. Standing beyond the line alone does not settle the decision.
There is no offside offence for receiving directly from a goal kick, throw-in or corner kick. A later team-mate's touch can create a new assessment point. ScoreZaap can show the event and revised result, but a scoreboard cannot supply every camera angle needed to judge a review. Wait for the official outcome.