Bb 13(b9) Guitar Chord | Learn, Play, and Master Interactively

Bb 13(b9) position 1 guitar chord diagram

Built on Bb, the Bb13(b9) chord (Bb thirteenth flat nine) combines a root, a major third, a perfect fifth, a minor seventh, a flat ninth, an eleventh and a thirteenth, which gives Bb, D, F, Ab, Cb, Eb and G.

The tool shows a single voicing, from fret 6 to fret 8, and it is not a barre shape. Over it you can use the Bb Half-Whole scale, built from alternating half and whole steps, which holds every chord tone except the eleventh.

Hear Bb13(b9) as a strum and as an arpeggio on the interactive fretboard at the top, one string at a time.

Bb 13th with flat 9th guitar chord is also written as Bb13(b9), Bb13b9 or Bb13-9.

Notes in the Bb 13(b9) chord:

Bb D F Ab Cb Eb G

How the Dominant Thirteen Flat Nine chord is built:

Formula: 1 3 5 b7 b9 11 13

Bb 13(B9) Chord Interactive Fretboard

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Bb 13(B9) Guitar Chord Diagrams

Position 1 Movable

Bb 13(b9) position 1 guitar chord diagram

Finger Positions

  • Mute the low E string
  • Mute the A string
  • Place your index finger (1) on the fret 6 of the D string
  • Place your middle finger (2) on the fret 7 of the G string
  • Place your ring finger (3) on the fret 7 of the high E string
  • Place your pinky finger (4) on the fret 8 of the B string

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Play This Chord With Other Roots

C 13(b9) | D 13(b9) | E 13(b9) | F 13(b9) | G 13(b9) | A 13(b9) | B 13(b9) | C#13(b9) | D#13(b9) | F#13(b9) | G#13(b9) | A#13(b9) | Ab13(b9) | Bb13(b9) | Db13(b9) | Eb13(b9) | Gb13(b9)

Giancarlo Facoetti, founder of FaChords Guitar

Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

What notes spell Bb13(b9)?

Bb13(b9) is Bb, D, F, Ab, Cb, Eb and G. That is the root, major third, perfect fifth, minor seventh, flat ninth, eleventh and thirteenth.

How many ways are there to play Bb13(b9)?

Only one valid voicing is on record for Bb13(b9). It has neither open strings nor a barre and spans frets 6 to 8.

Is Bb13(b9) the same chord as A#13(b9)?

Yes, they share all seven pitches. A#13(b9) spells them A#, C##, E#, G#, B, D# and F##, so Bb13(b9) is the cleaner name.

Which scale matches Bb13(b9)?

The Bb half-whole scale includes every chord tone except the eleventh, Eb. Its flat ninth, Cb, lines up with the chord's own flat nine.