C7, for instance, means a C major chord with a b7th (Bb). C9 (see Example 3) contains the b7th plus the 9th (D), so there’s more going on than many may suspect.

Guitar lesson: learn major guitar chords. Tuition. By Total Guitar published 2 April 2020 Guitar skills: ... Maj9, maj11 and maj13 chords simply add their respective notes to maj7 chord (D is the 9th, ...

Try playing these two shapes of the C major scale. The idea is to learn to move the shapes around the fretboard. For example, if you move either shape two frets higher you’ll be starting on a D note – ...