The Key of B is not a super common key to play in – especially on acoustic. Usually you just see people play key of G chords with a capo on the 4th fret or key of A chords with a capo on the 2nd. One of the reasons is the common chords in B include a lot of barre chords. With these alternate voicings, you can get around those pesky barre chords and play in open B. These work especially well on electric guitar with some tasty overdrive.
Common voicings in B
Here are the typical chords you’ll see, and the common ways to play them