seventh

A good option for the important C7 chord in the open position. It's easy to grab, the tritone is intact and the 5 in the bass gives it a good bluesy sound.

It's an 11th position chord because of the position of the first finger but it's based around the A on the 14th fret.

No 3 in this one so the tritone doesn't happen but it's an easy shape to grab and you may need one up here.

With the flat 7 but no 3 it only has half thr tritone so doesn't work so well unless you need a quick passing chord.

It may be useful if you're up this way but without the 3 there's no tritone and so the flavour of the chord suffers

It has the flat 7 note but no 3rd so not the best option for a seventh chord but will be useful from time to time

First position because the first finger is at the first  fret but tou should think of it as based on the 4th fret B where your little finger is.

In the 7th position because that's where the first finger is, think of it as based around the F on the 10th fret.

In the 6th position because that's where the first finger is, think of it more based around the tonic on the 9th fret

It's in the 4th position becasue that's where your first finger is. Think of it though as based around the 7th fret where the tonic is. A really important chord in the blues.