Heartbreak Warfare - John Mayer Standard Tuning Chords used by John : A x02220 D/F# 2x023x F#m 2x422x F 1x3213 C x32013 G 320033 OBS : To the big E string John uses the tong to hold the note or kill it .It's cool, more pratical. OBS2: The parts with A : you can switch the freets played in the B string, 0, 2 or 3 usual) and on the G string too, 2 or 4. OBS3: The parts with D/F# : you can switch the freets played in the B string, 0, 2 or 3 usual). Make yourself comfortable to choose the (azchords.com)