Root on A string
x-9-10-9-11-x
F♯7♭5 is the F♯ dominant 7 flat 5 chord. Its notes are F♯, A♯, C and E. It is the same chord as G♭7♭5. A four-note altered dominant. Mute both outer strings.
x-9-10-9-11-x
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every F♯, A♯, C and E on the first 12 frets. The filled dots are the root, F♯. Build your own shape from any nearby group.
Other F♯ chords
Other dominant 7 flat 5 chords