Caug 8-string guitar chord

How to play Caug on 8-string guitar

The most common way, the first shape above: lay your index finger flat across the two strings from the G to the high B at the 1st fret, your ring finger on the A string at the 3rd fret and your middle finger on the D string at the 2nd fret. Let the high E string ring open. Don’t play the F♯, low B and low E strings.

From the F♯ string x x x 3 2 1 1 0 (x: not played, 0: open)

What notes are in Caug?

Caug, C augmented, is C, E and G♯: the root (C), the major third (E) and the augmented fifth (G♯). Its formula is 1 3 ♯5.

Why do Caug and two other augmented chords have the same notes?

An augmented chord is two major thirds stacked, C, E and G♯, and a third more brings you back to C. So Caug has the same notes as the augmented chords on E and G♯.