Question: what is ab chord on guitar?
Answer: The B guitar chord is usually not one of the first chords you learn. ... You might recognize this chord formation as the A formation. It is played with a bar on the 2nd fret with the first finger across the 1st through 5th strings. Then you bar with your ring finger on just the 2nd, 3rd, and 4th strings on the 4th fret.