Making Major Chord Grips Into Minors

Learn how to work out the four types of triad chords on the guitar fretboard.

View the full lesson at Making Major Chord Grips Into Minors | JustinGuitar

In the example using the A chord why is string 1 not played for A maj, A min and A aug (fingered on the first fret)?

I guess it’s for pedagogical reasons given that the major/minor triad shapes are covered in sets of 3 strings in the course (1/2/3, 2/3/4, 3/4/5, 4/5/6).

Hi @mike_upa and welcome to the JustinGuitar Community.
With A Aug and A dim you must have an E# and an Eb respectively.
You would definitely not want an E natural note in those two chords.
Therefore the open E strings are not played.
For consistency they are also muted for the A major and A minor even though those chords do contain the note E (which can be found in the shapes shown anyway regardless of the open strings).
Does that help?
Cheers :grinning:
Richard_close2u JustinGuitar Official Guide and Moderator

Yes, sounds reasonable, thank you!