As for tacit knowledge of the expert,in studying/learning, I wanted to mention about my experience in attempting to ask several questions to my friends who get all A at highschool. The response is always the same things that many others said to me. Heck, I even tried to copy everything they did from head to toe but then after a long time before I came across the articles about mental models, my theory was that expert's understanding is somehow non-linear when what we see in reality is just a linear product which means even though I'm doing the same things as them on the outside, I don't see what they are doing inside their head. Like why even take notes in the first place lol? When I again with this realization asked them again, this time expecting similar answers as last time but I guess I wasn't surprised. Its probably had to do with how they think about information at hand, thus by using a pen to hold as much as connections they can until it doesn't fit in.
I taught a college class full of straight-A students. My assignment—an essay/think piece requiring creative engagement with a work of literature—was outside the scope of the skill set for most of them. Give them a pedestrian assignment that follows well navigated routes, they shine. Ask them to think outside the box and create something and they are lost.
The best hope for much older adults stuck at the same place in chess got to do with finding out that person's unconsciously and practicing them consciously. The best way that I have theorised so far about this to find strategies that forces you to improve even if you don't want to. Your consent is unnecessary.
Sorry had to write a long follow up on this, just happened to see Bobby fischer video where he teaches a host of a tv show how to play chess and yea, I get the corecion. First touch is toxic memories, moves-first approach. Reaction is wired on reflex due to bad edu system.