We are sorry to tell you that you have been playing ‘Father and Son‘ wrong on your guitar all this time. But who could have guessed that Cat made use of these strange chord shapes in his hit song?
The D/F# shape is used for all the verses sung by the father, while the son gets the more pointed Bm7/F# chord. These chords are especially difficult to identify by listening to the record, because in this case two upper bass strings need singling out, which is very uncommon for this chord family.
The only other song that comes to mind where Cat uses at least one of these chord shapes is ‘I Want to Live in a Wigwam‘.