As with last month’s 11th chords, we build 13ths by stacking extra 3rd intervals above simple major or 7th chords. So, in the case of C7 (C-E-G-B b ), by adding the 9th (D), 11th (F) and 13th (A) we create C13. Clearly, this is a seven-note chord, so on the guitar we remove some of the less vital intervals (often the 5th, 9th and 11th) and play them as much more guitar-friendly four-note shapes.
You can also build 13ths from other intervals in the C Major scale (and all other keys, of course). So, from the second degree of C Major (D) we get: D (root), F ( b 3), A (5), C ( b 7), E (9), G (11) and B (13). This is Dm13 From the fifth…
