B maj7♯11 = B · D♯ · F · F♯ · A♯ (root, 3rd, ♭5/♯11, 5th, 7th). 384 playable voicings on the standard E9 copedent — the best 12 by neck position below.
Low neck (frets 0–7)
Fret 7 · LKL + RKRLKL raises strings 4 & 8 a half step (E→F)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 7 · RKRRKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 4 · C + LKLC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)LKL raises strings 4 & 8 a half step (E→F)Fret 1 · B + RKRB raises strings 3 & 6 a half step (G♯→A)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)
Mid neck (frets 5–12)
Fret 9 · C + RKLC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)RKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 9 · RKLRKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 9 · CC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)Fret 9 · AA raises strings 5 & 10 a whole step (B→C♯)
High neck (frets 10–17)
Fret 11 · C + RKRC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 12 · LKL + RKRLKL raises strings 4 & 8 a half step (E→F)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 13 · B + RKRB raises strings 3 & 6 a half step (G♯→A)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 11 · C + LKR + RKRC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)