The note F# on the sixth string is not required, but can be played on the 2nd fret if needed. This chord is played start on fret 1 Dominant seventh (normal seventh) chord with added 13th (6th). Most of the time the 5th is left out (3rd note). The 13th = 6th 13th is used when the chord is a 7th chord with added 6th 6th chords are not 7th chords with added 6th.
Scale B: B C#m Ebm E F# Abm Bbdim
Note: x or F#, B, D#, A, C#, G#
Step: 1-3-(5)-b7-9-131(B), 3(D#/Eb), 5(F#/Gb), b7(A), 9(C#/Db), 13(G#/Ab)