No clean open shape — reached by barring the A-shape at the 2nd fret.
Index finger barres at the 2nd fret (A-shape moved up)
Notes: B – F# – D# · Formula: 1 – 3 – 5
Load B Major onto an interactive fretboard, hear every note, and build it into a progression.
Play B in the Studio →A B Major chord contains the notes B, F#, D#. It is built from the major formula 1 - 3 - 5, with B as the root.
The open strings simply don't line up with B major's notes in a way that produces a playable shape low on the neck. Instead, guitarists take the A major shape and move it up two frets, adding an index barre — which is why B major arrives after barre technique is underway.