Irish bouzouki B chord (GDAD)B major: 4 4 6 4, and 1 more shape

Frets, low course to high: 4 4 6 4 (from the 4th fret)

Sounds: B F♯ D♯ F♯ · B is B, D♯, F♯ (1 · 3 · 5)

Found in: E major (V), B major (I), B mixolydian (I), F♯ major (IV), F♯ mixolydian (IV), D♭ mixolydian (♭VII)

No 3rd: B5 (4 4 2 4) leaves the 3rd out, so it backs B major, mixolydian, dorian and minor tunes alike.

With a capo: on the 2nd fret it’s 2 2 4 2 (frets counted from the capo), an open A shape.

Tuning GDAD: G D A D, low to high.

The app starts on the Irish bouzouki in GDAD, so it opens on these shapes.

More B shapes

E major (V, a main chord): E – A – E – B (a plain backing for many reels and jigs)
B major (I, a main chord): B – E – B – F♯ (a plain backing for many reels and jigs)
B mixolydian (I, a main chord): B – A – B