Jimi Hendrix is without a doubt one of the most influential guitar players of all time. Even if you weren't a fan of his music (which is basically sin in the guitar world) there is no denying that he brought some unique techniques with his playing. Though there are many techniques that he utilized, the main technique I want to talk about is something that I call "The Other Hendrix Chord" and how I use it in my everyday playing.
The "Hendrix Chord" is referring to the dominant seven sharp 9 chord. Most commonly heard in the song "Purple Haze" pictured below.
However, the other 2 main chords in that song are the chords I want to focus on and how to utilize them in your own guitar playing.
The best way to explain what this chord is by first looking at a regular Major Bar Chord. For this example, we will look at the A Major Bar Chord. Jimi Hendrix would modify the fingering of this chord and use his thumb to wrap around the neck and reach the low E string. This would give him access to use his pinky to hit other notes. He could his pinky to then hit the Major 2nd making the A Major Chord a A Major add 9 or Aadd9 for short.
Below is a video of how I use "The Other Hendrix Chord" and an explanation of why it can be important for expanding possibilities on the fretboard.