Like the minor pentatonic scale, there are five different forms of the Blues scale which cover the whole fretboard. In fact, this principle of five fingering patterns applies to all scales. The diagrams below demonstrate the fingering patterns for the D form, C form, A form and G form.
Memorize the fingerings and then transpose them to other keys by moving them up or down the fretboard. Remember that there is only one note added to the minor pentatonic, so you already know the forms, you just need to add the b5 degree.
D Form (Pattern 2)
C Form (Pattern 3)
A Form (Pattern 4)
G Form (Pattern 5)
Here is a funky Blues solo in the key of E which moves through various different forms of the Blues scale. Listen to the CD several times to become familiar with all the rhythms and expressions and then work on it slowly until you can play the whole solo with your metronome or drum machine. Once you are confident with it, gradually increase the tempo until you can play it along with the CD.
Just before the high E note at the end of bar 8, you will notice the word Rake written above the tab. This indicates that the pick is raked across the 2nd and 3rd strings before striking the E note on the 1st string. This technique is common in Blues and is also frequently used by Rock players like Jeff Beck and Mark Knopfler. For an in-depth study of Blues playing,. see Progressive Complete Learn to Play Blues Guitar Manual.