The B dim chord notes on the guitar

The notes of the Bdim chord: B, D, F
The scale degree of a dim chord: 1, ♭3, ♭5 (♭=half step down)

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Bdim chord note names

Dim chords in all keys

Chord	Notes
Cdim chord	C, D♯, F♯
C♯dim chord	C♯, E, G
Ddim chord	D, F, G♯
D♯dim chord	D♯, F♯, A
Edim chord	E, G, A♯
Fdim chord	F, G♯, B
F♯dim chord	F♯, A, C
Gdim chord	G, A♯, C♯
G♯dim chord	G♯, B, D
Adim chord	A, C, D♯
A♯dim chord	A♯, C♯, E
Bdim chord	B, D, F

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