GOAL! The midfielder threads a pass through the defence and the striker latches on to it and scores. He's beaten the offside trap by timing his run perfectly and not moving past the second last opponent until after the ball was played.
NO GOAL! The striker is nearer to the opposition goal than the second last opponent when the ball is played. It's all about timing your run!
GOAL! Two players burst through and the winger plays the ball to the striker, who scores. Although the striker is ahead of the defensive line, he is not offside because he was behind his striking partner when the ball was passed.
GOAL! The midfielder plays a wayward pass, but it deflects off the defender's leg into the path of the striker - who's now in an offside position. As long as the striker was onside when his team-mate passed the ball, the goals stands.
GOAL! The striker in the middle latches on to a through-ball and scores. His team-mate was offside, but as he was not interfering with play the goal stands.
GOAL! This looks like a certain offside, but some quick thinking from the striker in the middle means it's not. He moves back onside, allowing his team-mate to come from an onside position and score.