B Thirteenth chord (B13) on the guitar fretboard

The B Thirteenth chord (B13) is made of B (the root), D# (major third, optional), F# (perfect fifth), A (minor seventh), C# (major ninth, optional), E (perfect eleventh, optional) and G# (major thirteenth). The fretboard shows every one of them across the neck in standard tuning (E A D G B E), and plays them back so you can hear the chord.

The thirteenth chord is the tallest of the dominant stack, running up through the seventh, ninth and eleventh to the thirteenth. On a six string neck most of the inner notes are optional, so shapes keep the root, the seventh and the thirteenth and drop the rest. Its smaller relatives are the ninth and the eleventh.