So, in the key of A (A B C# D E F# G#), the chords are A, D and E. Either jam on these three major chords or use 6ths, 9ths and dominant 7ths for an authentic blues vibe. We’ve used open-string root ...

However, there are many more chord shapes hidden away in this open D tuning – and don’t forget you can move shapes around for some nice surprises.