The notes on a guitar change in octave at the C notes on each string. Listed are the scientific pitch notations through fret 12.
The sixth string starts at the second octave (E2) and changes to the third at the 8th fret.
The fifth string starts at the second octave (A2) and changes to the third at the 3rd fret.
The fourth string starts at the third octave (D3) and changes to the fourth at the 10th fret.
The third string starts at the third octave (G3) and changes to the fourth at the 5th fret.
The second string starts at the third octave (B3) and changes to the fourth at the 1st fret.
The first string starts at the fourth octave (E4) and changes to the fifth at the 8th fret.
E dominant seventh chord: The first, second, fourth, and sixth strings are played open.
C dominant seventh chord. The first string is played open. The sixth string is not played.
B dominant seventh chord: The second string is played open. The sixth string is not played.
F major chord: The fifth and sixth strings are not played. 
E major chord: The first, second, and sixth strings are played open.
A major chord: The first and fifth strings are played open. The sixth string is not played. 
D minor chord: The fourth string is played open. The fifth and sixth strings are not played.
A minor chord: The first and fifth strings are played open. The sixth string is not played.
A dominant seventh chord: The first, third, and fifth strings are played open. The sixth string is not played.
D dominant seventh chord: The fourth string is played open. The fifth and sixth strings are not played.
