What is the B Diminished Scale?
The diminished (whole-half) scale alternates whole steps and half steps across eight notes, creating a symmetrical pattern that repeats identically every minor 3rd. This symmetry means there are really only three unique diminished scales, and they're essential for navigating diminished chord passages in jazz, classical, and progressive music. Here's how the B Diminished Scale lays out on the fretboard.
Notes and Positions
Symmetrical scale alternating whole and half steps. On guitar, the same scale tones repeat in multiple positions, so the real goal is learning how to connect shapes up and down the neck. Use the CAGED boxes as smaller practice areas before linking the full fretboard. In the key of B, the notes are: B, C#, D, E, F, G, G#, A#.
How to Use It
You'll often hear it in Jazz, Metal, and Classical. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.
Alternate between ascending patterns and short musical phrases so it doesn't become a "scale exercise" only. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.