open

A good voicing for a 7th chord that forms the basis of an important moveable shape.

You can play this one open but it's not going to work well as a moveable shape. There's no 5 either

A great voicing for the 3 string this one has the root in the bass and the other two on top to define the chord very clearly. It also forms the basis of a great moveable shape for this voicing.

You won't come accross a minor 6 too often but it's easy to grab on a 3 string, gives us another moveable shape and sounds cool so why not?

Compare this one to the major chord with the 3 up on the 4th fret and you'll see why the 3 is so important.

An important voicing with the root in the bass and the tritone on top. When playing a blues in G you need to wear this one out.

The 6 chord is commonly used in Jazz in place of a major chord. It has a cool sound that shows up in a lot of contemporary music as well. Give it a go.

Easy enough to play in the open position but you can't move it without a stretch. Sounds good though.

An important voicing with all three notes and the root in the bass.

Based on the 2nd position barre chord the b7 note is the open G on top. Note that there is no 3 though so you can't make a tritone and you lose the essence of the 7th chord. An easy shape though and it can still be useful for quick chord changes.