README

I took 16 chord types and found all ways to make them with at least 1
open string and within the first 3 frets.  These are the chords which
will generally form barre chords the best.  E.g. since C7 is 0001, you
can form D7 by adding 2 to everything to get 2223.  This means you
play fret 2 on the G-string, 2 on the C-string, 2 on the E-string, and
3 on the A-string.  Use your index finger to cover all the 2s then use
your middle finger to add the 3 on the A-string.

Chord inversions are ignored in this list.  I.e. in the 0100 voicing
of A7 the lowest-pitch note is C# not A so this might more properly be
called A7-first-inversion (or A7/C#).  --Dan

major
0003: CM
2220: DM
0331: EbM
2010: FM
2013: FM
0232: GM
2100: AM

minor
0333: Cm
2210: Dm
1013: Fm
2120: F#m
0231: Gm
2000: Am
2003: Am

diminished
2320: Ebdim
2020: F#dim
2023: F#dim
0131: Gdim
3101: A#dim

augmented
1003: Caug
2110: C#aug
0332: Ebaug

dominant seventh
0001: C7
1202: E7
0212: G7
0100: A7

major seventh
0002: CM7
1302: EM7
0222: GM7
1100: AM7
3210: BbM7

minor seventh
1102: C#m7
0202: Em7
0211: Gm7
0000: Am7

diminished seventh
0101: C#dim7

half-diminished seventh
0102: C#m7b5
0201: Em7b5
0111: Gm7b5
1101: Am7b5

minor major seventh
1103: C#mM7
0302: EmM7
0221: GmM7
1000: AmM7
3110: BbmM7

augmented major seventh
1002: CaugM7
1303: EaugM7
0322: GaugM7
1110: AaugM7
3220: BbaugM7

augmented seventh
1001: Caug7
1203: Eaug7
0312: Gaug7
0110: Aaug7

ninth
3203: C9
0310: F9
1021: Ab9

major ninth
1031: AbM9

minor ninth
2032: Am9

dominant seventh sharp ninth (hendrix chord)
3303: C7#9
1310: F7#9
1022: Ab7#9