I find it frustrating when chord chart makers insist on showing 2 dozen the variations of how top play an A, then an A minor, A minor 7, blah blah then a B etc... on their charts, Do they not play songs or tune backing? I want to play songs, generally in a position starting with first. I find the 1, 4, 5, 6 and 3 are the chords usually used in any song or tune if it is in a major key. If I have those I can get up and running right away. Sorry for the rant, it just makes more sense to me.