I had come across something like this in another forum where they posted a backing track once a month and quite a few members uploaded this back with their sololing on top and then got feedback and tips from the others.
Not sure if here would be enough players participating and also offering feedback?
I sure would participate, my soloing is better than Zero, but there are still lots of years of (hopefully) improvement waiting 
I’m interested in this. I’m working on major scale and blues improvisations (mostly me playing over my looper pedal), and this would help a lot!
great! So we’re two already 
There has always been a whole sub section for this on the forum.
So just start a challenge and anyone can participate.
As Rick says, we have the space and the dedicated category …
Sadly, it has not had much interest in recent years after an initial flurry of activity (originally in the old forum then here).
Thank you Rick for pointing this out!
Of course, I had seen this some (longer) time ago, somehow I had (wrongly) in mind that moderators only started challenges there.
Yes, sadly. Maybe because there’s so much going on in guitarland and people often look for “latest”. At least I often do and at times miss too much!
I think that we’ll add something soon, Ashu and me 
If we use a backing track, I just guess it needs to be safe regarding “copyright” issues. I mean, here, we are just the usual innocent guitar learners in some forum, but being this related to Justinguitar it maybe makes a difference and I certainly don’t want to cause problems for Justin.
I like this idea as well, Dominique, lets check it out I can have an backing track done for use from the band then we would not have to worry about copyright, just an idea my friend cheers HEC