Guitar Chords: Basic nut-position
Prepared by Alan Humm
Chord files color and symbol key
A regular diminished chord only has three notes, and is used seldom
enough that I have not included it (it is formed by removing the note
that is two strings over [either direction] from the root in the above
chart). Diminished 7th chords
either use the regular dominant 7th, or flatten the 7th as well. They are called
(respectively) either half-diminished 7th and diminished 7th, or diminished 7th and doubly-diminished 7th, depending on who you ask. To avoid
ambiguity I call them (and recommend calling them) half-diminished 7th (7) and
doubly-diminished 7th (7), which removes ambiguity. The one above is a
doubly-diminished 7th. Technically, the
by itself in a chart should be used for the three note
version (not 7th), but rarely is.
Half-diminished chords are given on the next sheet.
The diminished () and augmented () chords have roots on any
of the contained notes, and can be moved up and down the neck to obtain
all roots (e.g. F [F augmented] when played up one fret becomes
F♯/G♭, A♯/B♭, or
D, etc.). What notes are 3rd, 5th, and 7th depend on which note is the root.
There are actually three different kinds of diminished ()
chords (see the side note for the nerdy details1), but in pop and jazz the
one shown here (fully/doubly-diminished 7) is used 99% of the time; if you see
it this way (X), it almost always means this form.