guitar chord
C7
Major triad, minor seventh. The chord that wants to resolve a fourth up.
Every fingering that fits a hand
x32310
hard · no 5
x35350
moderate · barre
x35056
hard
8a8988
moderate · barre
x35353
moderate · barre
What is true of it
C7 is C, E, G and B♭ — 1, 3, 5 and b7 counted from C.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x32310: 4 fingers, held at the 1st fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
3 of the 5 need a barre.
It leaves out the 5. 6 strings cannot carry 4 notes, and the 5 is the one this chord can lose without changing what it is.
1 string stays silent.
Where its notes are on the neck
The brass dots are C, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
C7/E
012010
C7/G
312010
C7/B♭
x12010
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.