This chord chart lists most of the altered chords you will find in Jazz. A knowledge of these formulas is useful for both comping and improvising over altered chords.
In altered chords, the notes to be altered are always part of the chord name, enabling you to construct the chord. For example, a Cm7#5b9 (not listed above) is a Cm7 chord with the fifth sharpened (#5) and the ninth flattened (b9). When you are working out a suitable shape for this chord, remember that the root note and/or the fifth note may be omitted.
Another type of alteration occurs when chord symbols are written thus:
Example 1: G/F# bass
This indicates that a G chord is played, but using an F# note in the bass.
xample 2: C/G bass
This indicates a C chord with a G bass note.
Sometimes the word 'bass' will not be written (i.e. the symbol will be just G/F# ). These chords are referred to as slash chords.