https://muzland.info/cgi-bin/chords/chordgen/allchsm.pl?name=Db9-
Db9- (re flat major, seventh and diminished ninth) – options for the chord (Guitar), finger...
Muzland.info: options for the chord Db9- (re flat major, seventh and diminished ninth) on Guitar, finger notations.
major seventhdiminished ninthfor theflatoptions