The three most common chord types – Major, Minor and Seventh – are all based around the first few frets. The most useful of those shown below are outlined with a box. The boxed shapes are generally easier to play and should be memorised. These open chords sound particularly good on acoustic guitars and for fingerpicking.
A

A#/Bb

B

C

C#/Db

D

D#/Eb

E

F

F#/Gb

G

G#/Ab

Am

A#/Bbm

Bm

Cm

C#/Dbm

Dm

D#/Ebm

Em

Fm

F#/Gbm

Gm

G#/Abm

A7

A#/Bb7

B7

C7

C#/Db7

D7

D#/Eb7

E7

F7

F#/Gb7

G7

G#/Ab7
