B mixolydian chordson the Irish bouzouki, ADAD tuning

I – ♭VII – I: B – A – B
I – IV – I – ♭VII: B – E – B – A (reels in D or A mix)
I – ♭VII – IV – I: B – A – E – B (down and back home)

Main chords: B (I), A (♭VII), E (IV)

The scale: B C♯ D♯ E F♯ G♯ A

Drones: No open course is in the B chord in this tuning; A fits the key. The courses are A D A D, low to high.

Capo 2: play it with A mixolydian shapes, and every open course is in the key.

Common progressions

Basis: DADGAD Guitar blog (2009) and common session practice: the flat 7th's major chord (C in D mix) answers the tonic.