Here are two short riffs to illustrate two ways of playing
the third fret
The first example is a "Boogie Chillun" style riff and uses the
chord directly over the third fret (as well as the open and fifth).
The Boogie Chillun style riff
The second example is a more lead style riff which hits a
"blues" note at the third fret
- to get this note put the slide slightly below the third fret (about halfway
between frets 2 and 3) and then slide up to above the third fret (about halfway
between frets 3 and 4)
These notes are marked on the tab with an arrow and a quarter tone
- the tab has the same phrase played first on the 4th string then on the top
string (you can also play it on the bottom string)
This sharpening of the minor third note so that its between minor and major
is a key characteristic of many blues styles
Sharpening the 3rd fret note