‘B Sharp locrian’ is the 7th mode of the C sharp Major scale. The notes in B# Locrian are:
B# – C# – D# – E# – F# – G# – A#
If you have read the post on understanding the locrian mode, you will know that the locrian mode contains a ‘flat 2’, a ‘flat 3’ a ‘flat 5’ a ‘flat 6’ and a ‘flat 7’ (parallel approach). You will also know that it is the 7th mode of the major scale (derivative approach). The locrian mode is a very ‘dark’ sounding mode and is probably the hardest of the 7 modes to get acquainted with. Let’s briefly look at how to construct B# locrian using both the parallel approach and the derivative approach.
B# Locrian Mode Using The Parallel Approach
B# Major scale has the following notes:
B# – Cx – Dx – E# – Fx – Gx – Ax
If we ‘lower’ the 2nd note (Cx), 3rd note (Dx), 5th note (Fx), 6th note (Gx) and 7th note (Ax), we get the following:
B# – C# – D# – E# – F# – G# – A#
B# Locrian Mode Using The Derivative Approach
B# is the 7th note of the C# Major scale:
C# – D# – E# – F# – G# – A# – B#
If we play the C# Major scale and start on the 7th note we get the following:
B# – C# – D# – E# – F# – G# – A#
B# Locrian Mode CAGED Positions
Now let’s look at B# locrian in the 5 different CAGED positions along the fretboard.
B# Locrian in the 1st Position (Lowest Fret is 1)


B# Locrian in the 2nd Position (Lowest Fret is 2)


B# Locrian in the 5th Position (Lowest Fret is 5)


B# Locrian in the 8th Position (Lowest Fret is 8)


B# Locrian in the 9th Position (Lowest Fret is 9)


That covers the 5 basic positions and the open position of B# locrian along the guitar fretboard. For an in depth explanation of the locrian mode, check out locrian mode explained.