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Guitar chords · Dominant 9th

B9 chord on guitar

B9 (B 9th) has five notes: B, D♯, F♯, A and C♯, the , 3, 5, ♭7 and 9.

Shapes

How to play B9

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

B9 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

    ×R3♭795BD♯AC♯F♯
  • E shape · fret 7

    7frR5♭7359BF♯AD♯F♯C♯
Name a shape you're holding: the chord finder

Notes and formula

What makes B9 dominant 9th

A 9th chord is a chord with the 9th stacked on top. It keeps the 's pull to the chord a 5th below but sounds fuller and smoother: the sound of funk, soul and the blues. Keep the 3rd, the ♭7th and the 9th; the 5th can go.

  • 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, the ♭7th and the 9th make B9 a 9th chord; you can leave out the 5th.

  1. BRroot
  2. D♯3essential
  3. F♯5optional
  4. A♭7essential
  5. C♯9essential
EADGBE0135791215BBBBBBBBF♯AC♯D♯F♯AC♯D♯F♯AD♯F♯AC♯D♯AC♯D♯F♯AC♯D♯F♯AC♯F♯AC♯D♯F♯
  • B, the root
  • Other chord tones

B9 usually resolves to E or Em, the chord a 5th below: the V9–I move.

Keys

Keys with B9

B9 belongs to two keys: E major (V9) and C♯ minor (VII9).

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

B9 over another bass note

A keeps B9 on top and puts another note in the bass: the letter after the slash is the lowest note you play.

  • B9/D♯

    B9 with its 3rd, D♯, in the bass.

  • B9/F♯

    B9 with its 5th, F♯, in the bass.

  • B9/A

    B9 with its ♭7th, A, in the bass.

Questions

B9, in short

What notes are in the B9 chord?
B9 (B 9th) has five notes: B, D♯, F♯, A and C♯, the , 3, 5, ♭7 and 9.
How do you play B9 on guitar?
B9 has no common . Play it as the A shape at 2 or the E shape at fret 7.
What key is B9 in?
B9 belongs to two keys: E major (V9) and C♯ minor (VII9).
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