Out of theory pgns collection Looking for pgn files that end in taking the most popular openings out of theory.

Something like
1. d4 Nf6 2. c4 e6 3. a3

Where I can practice them in chessable.com
Since the question is about Chessable, I thought I'd pitch in :) If you use Chessable's Explorer Tool you will be able to navigate to a position such as 


d4 Nf6 2. c4 e6


and then see which options are available to you and their win rate.

For instance 3. a3 scores 36% W, 22% D, 42% B, so if you are White, you can see it would not be a good opening to pick.

By browsing like this, you can find good options and add them to your repertoire and try to avoid complex theory. You can also turn the engine on that page and check the lines with the Engine for possible continuations.

However, in my opinion, if you want to play out of theory the best thing is to pick some openings that are known for their relative lack of theory and see if a complete book exists on it (free or otherwise). For instance, Fianchetto systems or the London System come to mind as ways to play where you can play without much theory.

As Black, I've had a Master play things like the Pirc/Modern against me where they "wait" on the third rank for you. They did not seem to be playing theory but rather just a standard set of moves (fianchetto a bishop, play e6, etc.). I had a better position but since they took me out of theory into murky waters, eventually their time advantage paid off, and I lost. Presumably, this is what you are trying to do? :)

Having said all that, this week we are releasing a new book by a renowned French chess coach that has relatively little theory and guides you to sound openings where your opponent can quickly get in trouble. So stay tuned and look out for it!