Eb13b9 chord
Eb13b9 chord for piano presented by keyboard diagrams.
Explanation: The Eb13b9 alter the Eb13 by the change of one note. The E flat thirteenth flat ninth is a seven-note chord, but due to practical circumstances, one or more notes (the fifth primarily) are omitted. The chord name can also be written as Eb13(b9) or Eb13-9.
Theory: Compared to Eb13 the ninth tone in the chord is flattenedThe tone is one half step lower.
Eb13b9

Notes: Eb - G - Bb - Db - E - Ab - C
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Eb13#11 polychord
Explanation: The image below shows a polychord version of the Eb13#11. The chord is played in two parts with both hands.

Polychord Eb7 (LH), F (RH)