C#m7b5 is a half-diminished, spelled C#, E, G and B. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x6545x, which sits at fret 4, spans 2 frets and mutes 2 strings. 12 positions for it are shown below, from the nut up to fret 11.
Notes and intervals
Note
C#
E
G
B
Interval
1P
3m
5d
7m
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x6545xsits at fret 4, spans 2 frets and mutes 2 stringsx02422sits at fret 2, needs a barre across 4 strings at fret 2, lets 1 string ring open and mutes 1 string110119011sits at fret 9, spans 2 frets and lets 2 strings ring openx6998xsits at fret 6, spans 3 frets and mutes 2 strings110998xsits at fret 8, spans 3 frets, lets 1 string ring open and mutes 1 string110140014sits at fret 11, spans 3 frets and lets 3 strings ring openx65909sits at fret 5, spans 4 frets, lets 1 string ring open and mutes 1 string119110011sits at fret 9, spans 2 frets and lets 2 strings ring open11099011sits at fret 9, needs a barre across 2 strings at fret 9 and lets 2 strings ring open11990011sits at fret 9, needs a barre across 2 strings at fret 9 and lets 2 strings ring open1101190xsits at fret 9, spans 2 frets, lets 2 strings ring open and mutes 1 string1191100xsits at fret 9, spans 2 frets, lets 2 strings ring open and mutes 1 string
Keys C#m7b5 belongs to
C#m7b5 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.