Bb eleventh chords

Bb11 chord for piano presented by keyboard diagrams.
Explanation: The B flat eleventh is a six note chord. Due to practical circumstances and/or dissonance the third (D) is omitted and/or the chord is played inverted. The chord is often abbreviated as Bb11.
Theory: The Bb eleventh chord is constructed by adding a third to a ninth chord.

Bb11

Bb11 chord diagram
Notes: Bb - D - F - Ab - C - Eb

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Bb11 inverted

Bb11 chord diagram
One of many possible inversions

Bb chord categories

Bb Bbm Bb7 Bbm7 Bbmaj7 Bb6 Bbm6 Bb6/9 Bb5 Bb9 Bbm9 Bbmaj9 Bb11 Bb13 Bbadd Bb7-5 Bb7+5 Bbsus Bbdim Bbaug