AKA: C∅, C1/2dim, C1/2dim7, C7°5, C7b5, C Half-diminished, Cm7(-5), Cm7°5, Cm7b5, Cmin7dim5, C minor seventh flat fifth, C minor seventh flat five, Cø, Cº7
You can choose to play the bass (circled in green) or the counter bass (circled in blue). I prefer playing the bass but both positions are quite comfortable.
Notes:
C, E♭, G♭, B♭
Intervals:
R, m3°, m5°, m7°
Left hand:
C + E♭m
Fingering:
2 + 4 or 3 + 5
or 4 + 2 on counter-bass