The ability to place the left hand in a position to give equal opportunity for each and every finger to fret precisely is essential for playing well. Pinching a fret precisely means pinching a fret while avoiding contact with any adjacent string/s.
There are many instances where the ringing of adjacent strings is necessary. Think of your Bach fugues!
So here are two exercises I like to show students who are struggling with placing left hand fingers precisely. Some things to keep in mind:
- Listen! Keep your ear on the open string to make sure it rings continuously while you play the chromatic notes around it.
- Play really slowly to insure absolute legato.
- Keep right hand fingerings simple. Try using p and i or m for the open string.
- Pay attention to your wrist placement. It should remain relatively flat. Do not push your wrist out in front of the guitar. To create a tunnel for the open string take the bend across the joints in the finger. Think of creating a semi-circle with the finger.
Hope this helps clean up those sloppy pinches! : )