"The Minor 7th flat 5th chord is an alternation of the minor seventh chord, and is also known as half-diminished or Minor 7th minus 5th.
This chord is identical to a minor seventh except that
the fifth is lowered one step "
https://www.guitar-chord.org/7b5-minor.htmlÂ
The minor seventh flat fifth is built with the formula
1-b3-b5-b7.
This includes the root (1), the minor third (b3),
a lowered fifth (b5) and the minor seventh
Minor seventh flat fifth is often used as in between chord in blues and jazz progressions.
https://www.guitar-chord.org/7b5-minor.html
Movable shape root 6th string
Movable shape root 5th string
Movable shape root 4th string
Am7b5
Bm7b5
Cm7b5
Dm7b5
Em7b5
Fm7b5
Gm7b5