Assistant referee offside exercises – 25 clips by PRO
Some great assistant referee offside exercises by PRO. Because the Professional Referee Organisation in the US and Canada wants to help referees from a distance, they published this video on their YouTube channel. 25 clips in quick succession and it’s up to you to make the right call.
Update: more clips and options by PRO ๐

How the offside test works
The assistant referee offside exercises are difficult, but you don’t need much to take part. All you need to do is:
- Grab a pen and paper first
- Go to a quiet place and get focused on your role as AR
- Be aware 25 clips follow in quick succession
- Start the clip below and make the offside call
- Write down your decision on the paper
If writing down takes time, you can pause the clip. Please try to don’t re-watch the clips in the first round, as you can’t in a match either.
Video with assistant referee offside exercises
Watch the clip, write down your call and share below what your score is.
And don’t forget to subscribe to the PRO YouTube channel for interesting refereeing clips.
More options to do offside tests
By popular demand PRO has shared more clips. Great way to practise.
๐// Back by popular demand – the #PRO offside perception test returns, and with an additional layer of difficulty.
— PRO (@PROreferees) May 1, 2020
Have a go >> https://t.co/zFsB3OGQWR. pic.twitter.com/Jt95Hzb6DH
How did you do as AR?
And how did you do as AR? I’d love to hear from you what your score was and how many calls you got correct.
27 Comments
Lwandile Mfiki
I got 17 out of the 25 clips correct
Jan ter Harmsel
Thanks for letting me know. It’s quite difficult, isn’t it? Need lots of focus there.
Gulwa Siyasanga
I got 18 Itโs so difficult, it is nโt easy at all? It Need lots of focus there.
Jan ter Harmsel
True. It is indeed very difficult. Thanks for letting the result know.
DIMITRIOS TONIDIS
it’s difficult situation! i m referee from Greece!
extremely useful clips!!!
Jan ter Harmsel
Take care, Dimitrios. Hopefully all is wel with you. Stay safe!
pedro echegaray
Its difficult from the angle we have to watch on here even for us who are referees. The only true test is in person and being directly aligned with that defender from a straight line of sight.
Bur this video shows the public who are not referees how quickly and close the calls can be even with video help. So they need to be quiet. HaHaHa ๐
Have a good day Jan! Thanks for all you do
Jan ter Harmsel
More than happy to help and inspire you. Great to hear you like it.
Tonia
FIFA AR from Barbados. Very close calls, and not that easy. Definitely calls for a lot of focus. I got 20 correct.
Jan ter Harmsel
20 is good. most of us got less correct calls.
magdy frezk
hi Tonia
can we email each other?
Jan ter Harmsel
Did you get in touch?
Mario
I got 15 correct … all were very close calls and could have gone either way and no one would question the call. These very close ones I tend to favour the attacker ..certainly a very useful video .. and I too thank you for your dedication and continued promotion of the beautiful game
Jake
This is excellent. Too excellent in fact. I only got 13/25 so it’s a good job I’m looking to progress in the middle and not on the line haha
Jan ter Harmsel
Being a better AR will help you be a better referee too.
MetRef
11, although number 21 I felt the player shown as offside wasn’t affecting the play as he was running away from where the ball was played and the other player ran on to it.
Any tips on how to watch for trailing legs, as almost all of the ones I got wrong were giving offside when it wasn’t and the majority were when it was a trailing leg, rather than the torso?
Jan ter Harmsel
Difficult to train. Check out this interview. The researcher shows that experience usually helps. You’ll get to know what your moment is when you make the offside photo at the moment of the pass. If you get more understanding of how your mind works, then you’ll make better decisions.
brian smith
I got 8 wrong so 17 right = 68% Room for improvement
Herman
I got 17 correct, it got tougher when there were two defenders and two attackers. It would have been better to have the video on the same side of the AR as this is the direction we are used to seeing from. Nonetheless, excellent training material. Thanks for sharing.
Jan ter Harmsel
You can change direction if you view it on MirrorTube. Just an idea.
And I do have updated it with a link to more clips.
Daniel Baines
I managed to get 21 but I agree with whatโs said, these are extremely hard and some are very close. Some of these were giving the benefit of the doubt to the attacker. Not being able to use sound too makes it more difficult. Hard work but enjoyed it a lot so thanks for sharing. Canโt wait for more content like this
Jan ter Harmsel
Good job. And I do have updated it with a link to more clips.
magdy rezk
Smooth, easy and useful exercises, thanks
Jez C
i got 17/25
but without video assistance you would be hard pressed convincing the defending side that you had got the onside calls correct
Offsides are actually physically impossible to call as it is impossible to look in 2 places at the same time – this exercise is doubly difficult as there is no sound
Jan ter Harmsel
would you consider playing football without offside if you think its impossible?
Triinu Vaher
I got 17 correct. Very difficult but I like this test also when our EFA does it in practcal trainings.
Jan ter Harmsel
Great job!