Eb7-9 (Eb7b9) altered chord

Altered Eb chord for piano presented by keyboard diagrams.
Explanation: The Eb7-9 alter the Eb9 by the change of one note. The chord name can also be written as Eb7b9 or Eb7(b9).
Theory: The Eb7-9 are identical with the Eb9 except that the major ninth is flattenedThe tone is one half step lower.