C♯m7♭9 8-string guitar chord

How to play C♯m7♭9 on 8-string guitar

The most common way, the first shape above: your ring finger on the A string at the 4th fret, your index finger on the D string at the 2nd fret, your little finger on the G string at the 4th fret and your middle finger on the high B string at the 3rd 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 4 2 4 3 0 (x: not played, 0: open)

What notes are in C♯m7♭9?

C♯m7♭9, C♯ minor seventh flat nine, is C♯, E, G♯, B and D: the root (C♯), the minor third (E), the perfect fifth (G♯), the minor seventh (B) and the flat ninth (D). Its formula is 1 ♭3 5 ♭7 ♭9.