AKA: Ab∅, Ab1/2dim, Ab1/2dim7, Ab7°5, Ab7b5, Ab Half-diminished, Abm7(-5), Abm7°5, Abm7b5, Abmin7dim5, Ab minor seventh flat fifth, Ab minor seventh flat five, Abø, Abº7
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:
A♭, C♭, E♭♭, G♭
(A♭, B, D, G♭)
Intervals:
R, m3°, m5°, m7°
Left hand:
A♭ + C♭m (G# + Bm)
Fingering:
2 + 4 or 3 + 5
or 4 + 2 on counter-bass