C♯13 8-string guitar chord

How to play C♯13 on 8-string guitar

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

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

What notes are in C♯13?

C♯13, C♯ dominant thirteenth, is C♯, E♯, G♯, B, D♯ and A♯: the root (C♯), the major third (E♯), the perfect fifth (G♯), the minor seventh (B), the ninth (D♯) and the thirteenth (A♯). Its formula is 1 3 5 ♭7 9 13.