To play the Abm chord, place the index finger on the 1st fret of the top g-string, ring finger on the 3rd fret of the C-string, little finger on the 4th fret of the E-string, and middle finger on the 2nd fret of the bottom A-string.
The G# minor chord, also known as an Abm, contains the notes G#-B-D#.
To build a G#m chord, take the minor triad formula (1-b3-5) and apply it to the G# major scale (G#-A#-B#-C#-D#-E#-F##).
Identify the first, third, and fifth scale degrees in a G# major scale which are G#-B#-D#.
Because the chord G#m is a minor chord, lower the third scale degree a half step in accordance with the minor triad formula, which results in the notes G#-B-D# for the G# minor chord.
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