Move the players yourself — the offside rule explains itself in 30 seconds.
📖 One sentence: at the moment of the pass, if the receiver is in the opponent's half and closer to the goal than both the ball and the second-last defender (the yellow dashed line), it's offside. In short: no waiting by the goal!
Drag blue #9 (you) and the red defenders — the yellow dashed offside line follows them
Blue just passed to #9. You are the referee — what's the call?
How to use
Start in "Try it yourself": drag the blue attacker and the red defenders, press Pass, and watch the call change. The yellow dashed line always marks the second-last defender — that is the offside line. When it clicks, switch to Referee mode and judge 10 passes yourself. Wrong answers are free: every call comes with an explanation of why.
At the exact moment a teammate passes the ball, the receiver must not be closer to the opponent's goal than both the ball and the second-last defender (usually one outfield defender, since the goalkeeper is the last). If they are, the referee calls offside. The rule exists to stop attackers from simply camping next to the goal.
When is it NOT offside?
You can never be offside in your own half, when you are behind the ball at the moment of the pass, or when at least two opponents are between you and the goal. Real matches also exempt throw-ins, goal kicks and corner kicks — this trainer focuses on the main pass situation first.
Is this suitable for kids?
Yes — it was designed for complete beginners including children. There is no reading-heavy rulebook, no time pressure, no penalties for wrong answers, and no chat or user content. Just drag, pass and learn.
Does the trainer cover VAR and edge cases?
Not yet — on purpose. Professional edge cases (deliberate play by a defender, interfering without touching the ball, VAR line calibration) confuse beginners before the core idea has settled. Master the yellow line first; the fine print will make sense afterwards.