All chromatic notes (12 tones per scale) are available
on the standard solo system slide harmonica.
They are also available on the standard 10-hole Richter
diatonic, with mastery of bending and overblowing
techniques. Without the extra techniques, the diatonic
lacks a few scale tones in holes 2, 3 and 10.
The standard 12-hole solo system slide chromatic
has 3 complete consecutive major scales' range,
factory-installed, slide out; and another 3 consecutive
major scales' range with the slide in, a half step
higher in pitch.
The 10-hole Richter diatonic has only one factory-
installed major key, in holes 4-7. The other holes
are for accompaniment, not available on the slide
chromatic (solo system).
The chromatic was designed for melody playing, not
chordal playing. The diatonic was designed for simple
chords, with melody and accompaniment available.
Best Regards, Stay Healthy
JB