Locrian is the darkest mode — a minor scale with both a ♭2 and ♭5, unstable by design and most at home over half-diminished chords.
Locrian is the darkest mode — a minor scale with both a ♭2 and ♭5, unstable by design and most at home over half-diminished chords. On guitar, the b locrian scale uses the notes B, C, D, E, F, G, A — the diagram above shows every one of them across all positions of the neck, with the root (B) highlighted so you can anchor each shape.
KnowYourNeck turns this into an interactive neck you can rotate through every position, switch between note names and scale degrees, and drill one box at a time with Focus Mode. It's the fastest way to actually learn the locrian scale instead of just reading a chart.