Root on A string
no fifthx3133x
Cm9 is the C minor 9 chord. Its notes are C, E♭, G, B♭ and D. A minor seventh with a ninth. This compact grip omits the fifth.
x3133x
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every C, E♭, G, B♭ and D on the first 12 frets. The filled dots are the root, C. Build your own shape from any nearby group.
Other C chords
Other minor 9 chords