Changing chords can be difficult at first but there’s a few tricks that you can learn to make it a lot easier. In this mandolin technique, we’ll focus on how to use Guide Fingers to speed chord changes to help your playing.
What is a guide finger
A guide finger is a finger that either doesn’t move at all or doesn’t move much when changing between two chords – generally just 1/2 step (or one fret) or full step (2 frets) up or down the neck.
For example, when going from the G Chop chord to a D Major chord, the note on the D string in both chords is 1/2 step, or one fret, away from each other. In addition, the note on the D string will be fretted by the 3rd or ring finger in each chord. So in this case your 3rd or ring finger would be the “guide finger”
Start by fretting the G Chop chord. Release the press on your ring finger but keep it in contact with the D string and slide it back 1/2 step (or one fret). Then form the D major chord around that. Then do the same thing, but in reverse – start with the D Major and move to the G Chop. Note: you could use the 3 finger G Chop here (omitting the D note on 7th fret of the G) and this still works.
Admittedly the below chart may be hard to read – but I wanted to try to show case this a little more. Below shows the G Major chop (green notes with blue outlines) and the D Major chord (yellow notes with purple outlines). The D note is a common note in both chords – but the specific D note used is not common. So the D in green with blue outline is part of the G chord and the D in yellow with purple background is part of the D chord. The numbers above each note are your fingers.
Looking at the D string the notes G (root of G chord) and F# (3rd of D chord) are 1 fret away from each other and both use the 3rd finger. So when changing between these two chords, you can just slide your 3rd finger up or down one fret depending on which chord your changing to.
The below video should help as well.
Gifs to the rescue!
Diagrams are nice, but I think the below gifs are a bit more helpful. You should be able to use these ideas to find the guide fingers for most chord changes.
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