>Precision is a murky concept in chess because it is not a solved game
it's ironically also a murky concept for the opposite reason. In some openings the analysis of GM's goes so deep that they can fairly often play almost exclusively computer-aided prep. There's a big difference between a 40-move game in that kind of theoretical position vs off-beat games.
So you might have a very precise, narrow, theoretical repertoire but that's not the same as playing strength because your opponents can prepare. What really matters is more something like precision under uncertainty.
it's ironically also a murky concept for the opposite reason. In some openings the analysis of GM's goes so deep that they can fairly often play almost exclusively computer-aided prep. There's a big difference between a 40-move game in that kind of theoretical position vs off-beat games.
So you might have a very precise, narrow, theoretical repertoire but that's not the same as playing strength because your opponents can prepare. What really matters is more something like precision under uncertainty.