Also C Diminished (half-whole), E♭ Diminished (half-whole)
B♭ Diminished (whole-half): B♭ C D♭ E♭ F♭ G♭ G A. Formula 1 2 ♭3 4 ♭5 ♭6 6 7. Same notes as C Diminished (half-whole), E♭ Diminished (half-whole), F# Diminished (half-whole). Whole and half steps in turn, starting with a whole step: it fits diminished 7th chords and repeats every minor 3rd.