Madameve, correct me if I am wrong, but you are saying that all a person has to do is choose 12 chords from your offerings according to the possible twelve tones, learn just those twelve(in all inversions?), and your passing chord concerns are over.(regardless of the key, minor or major) Most beginners would see that as learning 36 to 48 chords with some justification for feeling that way, but if they knew that it would resolve the passing chord problem, they might do it. These chords could be used otherwise so nothing would be lost in learning them.(except maybe best application of practice time)
As an intermediate level player, I really don't know what I use as passing chords. I just play something. But such a statement as you are apparently making would have been a significant benefit to me as a beginner.
I ask the question because sometimes that which is stated in simple terms turns out to be very difficult and more complicated than it appears. Though many programs work, you usually really have to get down into the trenches to get the benefits as stated by those who issued the study. It seems that finally you have to have all these chords under your fingers at a moments notice, and that is not at all easy to do.
