Guitar triads are three string chord combinations achieved by muting the three other unplayed strings. Instead of playing bar chords and open guitar chords, guitar chords can be voiced as three note triads. With this technique the guitarist has to to mute the three unplayed strings with their unused fingers on their fretting hand. The produces a simpler and cleaner sound than five or six note bar chords and open chords.
Guitar triads can be played on any of the four groupings of three strings, but different fingering is require for some sets of strings. On each set of three strings the triad can be played in three different places, which make up the three different inversions: root position, first inversion, and second inversion.
The chart below shows all basic minor guitar triads and their first and second inversions.