Let's say the goalie (Team A) is way up the field (let's say for a corner kick late in the game)... He leaves one defender (Team A) parked on his 18 yard box... The opposing team wins the ball and starts a quick counter... the ball gets played up to the 2 forwards on team B who advance the ball past half field and find themselves in a 2 on 1 with the defender (team A) parked on the 18 box.
Let's say forward # 1 passes the ball up to forward #2 who is not quite at the 18 where the defender is sitting. Is this offside because there is only 1 defender? (goalie is too slow getting back)