This article expands on your knowledge of blues guitar chords byexplaining how to play the twelve bar blues, which is the basisof many blues songs.For this article, you should know how to play the followingbasic guitar chords: C, F, G, and the following essential bluesguitar chords: C7, F7, G7. If you don't know how to play thosechords, read my article "Blues Guitar Chords Tutorial: 7Essential Blues Guitar Chords".Twelve Bar Blues BasicsNot every blues song is based on the twelve bar blues, but manyare, and it's the essential blues chord progression....