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Guitar chords · Diminished

B° chord on guitar (Bdim)

B° (B ) has three notes: B, D and F, the , ♭3 and ♭5.

Shapes

How to play B°

Strum a shape to hear it, or pick it one string at a time. R marks the ; the other numbers are the chord tones.

B° has no common . Play it as the A shape at 2 or the E shape at fret 7. A keeps its fingering anywhere on the neck: slide it up or down and the , on the lowest played string, names the chord.

  • A shape · fret 2

    ××R♭5R♭3BFBD
  • E shape · fret 7

    7fr××R♭5R♭3BFBD
Name a shape you're holding: the chord finder

Notes and formula

What makes B° diminished

A chord stacks two minor 3rds, so its 5th is a flat. It sounds tense and unstable and is usually a passing chord; in a major key it is the vii° chord.

  • 1Root: the note the chord is named after. Keep it.
  • 3Essential: makes the chord what it is. Never drop it.
  • 5Optional: drop it first when you run out of fingers.

The ♭3rd and the ♭5th make B° a chord.

  1. BRroot
  2. D♭3essential
  3. F♭5essential
EADGBE0135791215BBBBBBBBFDFDFDFDFDFDFDFDF
  • B, the root
  • Other chord tones

B° usually resolves up a to C or Cm, the chord it leads into.

Keys

Keys with B°

B° belongs to three keys: C major (vii°), A minor (ii°) and C minor (vii°, ).

Numerals follow the key's own scale, so III, VI and VII in a minor key are its own major chords. A ♭ or ♯ in front marks a chord from outside the key. How Roman numerals work

Slash chords

B° over another bass note

A keeps B° on top and puts another note in the bass: the letter after the slash is the lowest note you play.

  • B°/D

    B° with its ♭3rd, D, in the bass: the first inversion.

  • B°/F

    B° with its ♭5th, F, in the bass: the second inversion.

Questions

B°, in short

What notes are in the B° chord?
B° (B ) has three notes: B, D and F, the , ♭3 and ♭5.
How do you play B° on guitar?
B° has no common . Play it as the A shape at 2 or the E shape at fret 7.
What key is B° in?
B° belongs to three keys: C major (vii°), A minor (ii°) and C minor (vii°, ).
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