Play a Complete 12-Bar Blues on Piano With Basic Chords

The whole twelve-bar form, numbered

Each bar has four counted beats. Bar 12's G7 sets up the return to bar 1. This is one common arrangement of a blues form, not a universal template for all blues recordings.

First pass: one dependable sound

At an optional slow counting rate around 50 BPM, put left-hand roots C3, F2 or G2 on each bar's first beat and right-hand block triads on beat 1. Count the other beats aloud. The first goal is remembering which bar you are on, not swing feel. Mark bars 1, 5, 9 and 12 as recovery points if you get lost.

Second pass: add a seventh

Replace triads with the stated seventh chords only when the underlying changes are secure. The sevenths add notes B-flat, E-flat and F that create distinct tension. If the fourth note is physically awkward, divide the chord between hands or omit a duplicate root once the bass supplies it; don't hurt your hand squeezing all notes into one shape.

Third pass: choose a groove

Try light right-hand chord attacks on beats 2 and 4 while the left hand plays roots on 1 and 3. Keep a straight count first. The two-bar boogie lesson introduces a different shuffle feel; don't layer it into the form until you can count twelve bars confidently.

For a complete explanation of the extra notes in C7/F7/G7 see seventh chords.